Hi guys please diarise 27 March 2010 for sound off ,details to follow.

Quote:Can we have a sadan challenge? :)

Nice -- will watch this spot..

hi guys details of the show to be out soon, we are just finalising a few stuff ,but the show will defenately be off the hook thanks to all the sponsers .

Sounds like its gonna be a good one! I'm definately there!

doen it zaid

IdBL - 1
Section 7
IdBL
Rules
THE ULTIMATE SPL CHALLENGE
IdBL - 2
IdBL Divisions and Classes are designed to give all competitors, from newcomers to local competitors to seasoned veterans, a
“place to play”.
IdBL Divisions classify competitors by their experience and the level of modifications to their vehicles, while the Classes within
the Divisions ensure that competitors are pitted against others with a similar amount of subwoofer cone area. Each Division
section describes competitor, vehicle and equipment criteria, plus rules specific to that Division. The following chart lists all
IdBL Divisions and Classes:
The IASCA dB League (IdBL) is a contest of measurement of the maximum sound pressure level (SPL) that can be
generated from an automotive sound system. It has no bearing on the perceived sonic qualities of acoustically accurate
music and sound reproduction, moreover, it is a challenge of scientific proportion.
The IdBL competition format classifies competitors by three main criteria; first is the amount of square inches of subwoofer
cone area, second is by the level of modifications to the vehicle and third is by the amount of equipment in the vehicle.
Variations of these main factors classify competitors into 6 different Divisions, 5 of which contain 3 Classes based on the
amount of square inches of subwoofer cone area.
THE IdBL COMPETITION FORMAT
DIVISIONS
AND
CLASSES
ROOKIE DIVISION
Rookie 1 Class - 1 to 160 sq. in.
Rookie 2 Class - 161 to 260 sq. in.
Rookie 3 Class - 261+ sq. in.
STOCK DIVISION
Stock 1 Class - 1 to 160 sq. in.
Stock 2 Class - 161 to 260 sq. in.
STOCK PRO DIVISION
Stock Pro 1 Class - 1 to 260 sq. in.
Stock Pro 2 Class - 261+ sq. in.
ADVANCED NO WALL DIVISION
Advanced No Wall 1 - 1 to 260 sq. in.
Advanced No Wall 2 - 261+ sq. in.
ADVANCED DIVISION
Advanced 1 Class - 1 to 260 sq. in
Advanced 2 Class - 261 to 520 sq. in.
ULTIMATE DIVISION
Ultimate 1 Class - 1 to 520 sq. in.
Ultimate 2 Class - 521+ sq. in.
Stock 3 Class - 261+ sq. in.
Advanced 3 Class - 521+ sq. in.
IdBL - 3
Once classified, competitors compete against all others in their cone area Class to achieve the highest possible SPL score. The
competitor with the highest score in their Class at the end of the event is the winner of that Class. Typically, most events allow
competitors two chances at achieving their highest SPL score, giving them the opportunity to better themselves and have a
chance at winning.
You may be asking yourself “Why classify competitors by square inches of subwoofer cone area?”. Well, the answer is
simple; because there are so many different types, shapes and sizes of subwoofers available on the market today, this format
allows a competitor to compete against another with approximately the same “amount” of subwoofer cone area.
Oftentimes you’ll hear of a competitor running two ten inch subwoofers competing against someone who has two fifteen inch
subwoofers; hardly an even match. By using the square inches of subwoofer cone area formula, a competitor with two ten inch
subwoofers would compete against another competitor who may be running either two ten inch subs themselves, or three eight
inch subs, or one twelve inch sub; not someone with two fifteen inch subs. Someone with two fifteen inch subs would compete
against someone with three twelve inch subs, or four ten inch subs, because they have approximately the same “amount” of cone
area.
The next question usually is “Why rate by subwoofers at all? Why don’t you rate by the amount of power?” And that is a
valid question… here’s why: policing the actual rated power of an amplifier has long been the unsolved riddle of autosound
competition. Amplifier power ratings can vary greatly, depending on what voltage and impedance they are rated at. Using a set
voltage or impedance rating to determine amplifier power
opens up the possibility to rate an amplifier at a lower power rating; decreasing the impedance of, and increasing the voltage
to, that amplifier allows the amplifier to deliver much more power than it is rated for. This creates a situation where ratings are
now not what they seem and is not an accurate formula to offer fairness to all competitors.
Now, let’s look at the physics of a loudspeaker; in essence, speakers and subwoofers are, in varying degrees, power limited. Too
much power to a subwoofer and BOOM, you just blew a sub. Typically, the larger a subwoofer is, the larger a motor
structure it has and it will typically handle more power. So, the larger (or more) subwoofer cone area you have, the more power
you can add.
By using this classification method, competition and winning comes down to creativity in subwoofer cabinet design and
construction, as well as proper use of your audio equipment. It no longer comes down to “Whoever can throw the most money
into their equipment and system wins”. In IdBL competition, the benchmark for winning is ingenuity in design and equipment
use, not how much money you have.
Another popular question is “So how do I calculate how much subwoofer cone area I have in my system?” There are
different methods for calculating cone area, depending on the shape of the subwoofer. For round subwoofers, the formula for
calculating cone area is Radius squared times Pi (3.14). Example: Take a ten inch round subwoofer; the radius of all
subwoofers is half the diameter, so the radius of a ten inch subwoofer would be 5 inches; the radius squared would be 5 times 5
which equals 25. 25 times Pi (3.14) equals 78.5. And there you have it; the total cone area of a ten inch subwoofer is 78.5 square
inches. It’s even easier for square subwoofers; simply multiply two connecting sides of a subwoofer together (e.g. square 12
inch woofer—12 times 12 equals 144 square inches) and that’s it. There’s a cone area calculation chart for round subwoofers at
the end of this section for quick easy reference. Once you know the amount of square inches of subwoofer cone area you have
for each size of sub you have, simply multiply that amount by the amount of subwoofers you have in your vehicle and you’ll get
the total cone area for your vehicle.
Once you’ve calculated the total subwoofer cone area of your sound system, refer to the vehicle criteria for each IdBL
Division to determine what Division you will be able to compete in. And that’s it! You’re on your way to competing in IASCA
IdBL competition!
Competing in IdBL competition is designed to be fair and fun. We designed it that way for you, the competitor, so go out and
have a great time at an IdBL competition today!
IdBL COMPETITION FORMAT (cont.)
IdBL - 4
1. Competitors in any Division or Class, during SPL testing, who must operate their sound system from inside the vehicle,
must wear approved hearing protection. IASCA always recommends operating an SPL competition system from outside of
the vehicle in every situation. However, contestants who choose to operate from inside the vehicle will do so at their own
risk, accord and responsibility. If the vehicle’s system is capable of exceeding 150 dB, IASCA requires the use of external
control/s such as a remote control or similar device allowing the operation of the competing sound system from outside of
the vehicle. Failure or refusal to do so subjects the competitor to disqualification without recourse. IASCA will not permit
any competitor to be inside of a vehicle that could register over 150db with or without hearing protection.
2. The frequency cap for IdBL competition is set at 100 Hz. Official IASCA AC-3056 AudioControl meters have filters built
in to the unit to eliminate frequencies over 100 Hz during testing. This policy is in place to create a fair and consistent
playing field for all.
3. The sound system in the vehicle must be powered by the vehicle’s charging system and batteries only. External power
supplies, trailers, or chargers may not be attached to the vehicle during testing. The use of these items is allowed prior to
testing but must be disconnected before entering the competition lane.
4. There are specific power input voltage limitations per Division; please refer to the individual Division rules for specific
voltage limitations. During testing, IASCA Certified IdBL judges may elect to connect a voltmeter to the vehicle’s electrical
system to ensure compliance with this rule. It is the competitor’s responsibility to ensure that easy access is available to
power connections so that judges can connect the voltmeter safely and in a timely fashion. Failure to allow judges to
connect a voltmeter to the vehicle’s electrical system during testing could result in disqualification from the competition.
5. The program material used in testing must be commercially available CD software (e.g. - store bought CDs). CD-R’s, CDRW’s,
MP3’s, iPods, etc. are not allowed for use in competition. Any other reproduction format that is not listed is subject
to the approval of the event Head Judge. Any commercially available CD is acceptable at SPE and DPE events, unless the
event is sanctioned as an IdBL World Record Event. For TKE and IdBL World Record Events, the Official IASCA IdBL
“Max dB3” CD is the only acceptable CD for use.
6. Vehicles with cracked or broken windshields will be allowed to compete in IdBL events if the cracks are covered with a
protective material (e.g. duct tape) to eliminate any chances of the glass breaking out of its mounting.
7. The use of compressed air, explosive devices or gases etc. is not allowed.
8. Engine RPM while testing - The vehicle’s engine rpm cannot exceed 2,000 rpm during testing. For vehicles that do not
have a tachometer, competitors will be at the discretion of the event judges to determine if the vehicle’s engine rpm exceeds
2,000. This is to ensure the safety of all who are participating and/or spectating during the testing.
9. If the vehicle is running during testing, the parking brake must be set. If the parking brake cannot be set, the competitor
must use wheel chocks under the vehicle’s tires to ensure the safety of everyone around the vehicle, or shut the vehicle off
during testing.
10. Driver and passenger doors must have a flexible gasket seal between the door and doorjambs to provide a safe routing of the
measuring device cable, protecting it from being cut or pinched. In certain cases, alternative protection devices will be
allowed at the Head judge’s discretion. In all cases, the measuring device cable provided by the IdBL judge must not pass
through any connection devices that are mounted in or on the vehicle. The connection of the measuring device to the meter
must only be done with the measuring device cable supplied by the judge and the same devices must be used to measure all
the vehicles competing.
11. Competitors may have as many additional people as they require to prepare the vehicle for competition. However, a
maximum of six (6) additional people are allowed to hold down the vehicle during testing. These additional people must
have both feet on the ground at all times during testing and cannot block the view between the competitor and the meter
judge. Having a person or additional persons sitting on top of, or inside, the vehicle during testing is not allowed.
12. The only person allowed to be sitting inside the vehicle during testing is the competitor or their assigned co-pilot; whoever
is designated to operate the system during testing. Only one person is allowed to be inside the vehicle during testing, no
exceptions.
13. Barriers or partitions between driver and passenger compartments are not allowed. No modification designed to divide the
passenger compartment from the driver’s compartment above the top of the vehicle’s dashboard (Ultimate Division) and/or
console (All other Divisions) is acceptable.
14. The equipment reproducing the program material must be commercially available through standard retail channels. This
includes, but is not limited to, amplifiers, speakers/subwoofers, CD head units and processors. If a piece of equipment is in
question, it will be at the discretion of the event Head Judge to allow its use or not. Modifications to equipment are allowed
in certain Divisions; refer to the criteria for each Division to establish what is allowed.
15. Subwoofers, enclosures (sub boxes), vents, ports or walls must be located behind the vehicle’s “B” pillar during testing.
Exception: In the case of Ultimate Division vehicles that have a wall, it may pass forward of the “B” pillar of the vehicle,
so long as it allows for seating (fetal position is acceptable) of two average sized adults (5’9”, 180 lbs.) and maintains a
distance of 24 inches from the measuring device. This distance is measured from the point on the wall that protrudes the
furthest (including speakers, surrounds, supports and braces).
IdBL GENERAL POLICIES AND PROCEDURES
IdBL - 5
16. A competitor may not add speakers to, or remove speakers from, a system in a vehicle competing during the course of a
competition, so as to enable competition in another class. Once a competitor has registered for a competition, the Division
and Class they have specified on the score sheet is the Division and Class they will compete in unless, upon inspection
by IASCA officials, the competition vehicle is found not to be within the guidelines set out for the Division or Class they
are registered for. In this case, the judge/s will reclassify the vehicle for competition.
17. Competitors in all Divisions and Classes may use specific items to cover or tie down external components on the outside of
the vehicle, in order to reduce those components from rattling (e.g. roof racks, license plates, rear spoilers, etc...). Items that
may be used to reduce rattling are: blankets, sound deadening, bungee cords, rope and similar items. Items that cannot be
used are such items that weigh an excessive amount that could potentially increase SPL, such as cement blocks, filled water
bottles, batteries, wood boxes and the like.
18. Competitors in all Divisions and Classes except the Ultimate Division are not allowed to add additional items to the interior
of the vehicle in order to decrease cabin volume for the purpose of increasing SPL. Any items in the interior of the vehicle
(in all Classes, no exceptions) must be solidly attached to the inside of the vehicle and designed to remain in the vehicle,
while competing or not. Therefore, items similar to those listed in the rule above, such as cement blocks, wooden boxes,
water jugs and the like cannot be placed in the vehicle prior to competing or while in the judging lanes. If any these items
are built in to the installation of the system and have been mounted solidly, they will deemed acceptable only after
inspection from the Head judge. Additionally, competitors are not allowed to have additional people sitting in the vehicle
during testing in the lanes. The only person allowed in the vehicle during testing in the lane is the person operating the
system (the competitor or their assigned co-pilot).
19. All panels of the vehicle (hood, doors, trunk/hatch, sunroof, windows, tonneau covers, truck caps, etc..) must be closed
during testing for the duration of the SPL run (30 seconds). At no time during the SPL run can any panel be opened until the
SPL run is complete. Failure to comply with this rule may result in disqualification. Exception: Certain vehicles that have
their source units mounted in or behind panels, so as to allow operation of the system from outside the vehicle. In these
situations, the competitor must advise the Head Judge prior to competing and present the vehicle for inspection to the Head
judge. So long as the panel in question, in it's open (or operational) position, does not allow airflow to the inside (or venting
to the outside) of the vehicle during testing and the competitor can prove this, the judge may approve the vehicle for
competition.
20. The Head Judge has the right to require any competitor to tear down their vehicle and/or system for the purpose of rules
compliance. Refusal to do so may result in disqualification form the event.
BREAKDOWNS - As unfortunate as they are, breakdowns do happen. We at IASCA understand this and want to offer the
competitor as much opportunity as possible to rectify the situation. That is why we have developed a policy for this
contingency.
In the event a competitor experiences a breakdown while in the lane prior to being tested, they will be directed to remove their
vehicle from the lane and will be allowed ten minutes to repair the problem. If the competitor repairs the problem in the time
allotted, they will be allowed to compete without penalty. However, if the competitor cannot repair the problem within the time
allotted, they will forfeit that run and receive a score of zero. They have until they are called up for their final run to repair the
problem and bring their vehicle into the judging lane. In this case, they will only be allowed to run once (their final run) and will
have to stand with the score they post.
If a competitor experiences a breakdown prior to entering the competition lane, it is the competitor’s responsibility to notify
the IdBL Head Judge of a breakdown if additional time is needed to repair the breakdown. The competitor must notify the IdBL
Head Judge early enough to allow sufficient time for the Head Judge to make alternate arrangements while waiting for the
competitor to repair the breakdown. However, if the repair cannot be completed within the regular time frame of the event, the
competitor will receive a score of zero for their run/s.
TIEBREAKERS
A tie score is determined by two competitors achieving the same score after two (2) runs. Example: Competitor A scores 149.9
dB in their first run and 150.0 dB in their second run. Competitor B scores 150.0 dB in their first run and 149.7 dB in their
second run. Both competitors achieved a high score of 150.0 dB after their two runs and are therefore tied. Once all regulation
runs are completed, the competitors that are tied will return to the judging lane for a third “tiebreaker” run. Both
competitors will then be judged and the competitor with the highest score in the tiebreaker run will be declared the winner in the
tiebreaker and be awarded the higher position in the standings, regardless of the previous scores. If the tie is not broken after
two tiebreaker runs, IASCA will award duplicate placing for the tied competitors. The results of a tiebreaker can only affect
the positions below the tied competitors. Example: If the tie is for second place, only the second and lower positions can
IdBL GENERAL POLICIES AND PROCEDURES (cont.)
IdBL - 6
change, even if one or more of the tiebreaker scores are higher than the first place score. If one of the tied competitors fails to
appear for their tiebreaker run/s, they forfeit the position they are competing for.
EVENTS
NOTE: The average IdBL event usually offers two runs, however it is up to the discretion of the event host. Due to the high
volume of competitors at some events, some event hosts may only have time to offer one run; please check with the event host
before going to an event to verify how many IdBL runs they will be offering.
CHANGING/MOVING DIVISIONS AND/OR CLASSES
Competitors who wish to change the Division or Class they compete in must request this change in writing to the IASCA
office either by mail, fax or email for approval.
An IdBL competitor may move up or down in Division or Class one time during the competition season and maintain the
points they have accrued, as long as they accrue a minimum of 50% of their points in their new Division/Class during the
season. Once the competitor moves to the new Division/Class, they can no longer accrue any points in the old Division or Class
that they used to compete in.
An Advanced or Ultimate Division competitor who no longer works within the industry cannot move down to the Stock
Division within the same season; however, they can move down to the Stock Pro Division so long as their vehicle meets the
criteria set forth for that Division.
If a competitor is found to be alternating between Divisions or Classes through the competition season in order to gain
points, that competitor will forfeit all points accrued in any Division or Class and have their invitation to compete at the
Finals revoked for that season.
Competitor Division and Class specifics
• Competitors with one vehicle are only allowed to compete in one class at any event.
• Competitors who compete with more than one vehicle may do so, but they must hold an individual membership card for
each vehicle competing.
• Competitors can only compete in the Division and cone area Class they fit into. Example: A Stock Division competitor
with two ten inch subwoofers must compete in the Stock 1 Class; they cannot compete in any other Division or Class
within the same event or at other events, unless prior approved by the IASCA Head Office. IASCA Affiliate country offices
may approve a competitor’s request for a class change within their country (or area of responsibility), but must notify the
IASCA Head Office of the change.
IN THE COMPETITION LANE
1. The competitor has three (3) minutes from the time the measuring device is positioned in the vehicle to prepare their
vehicle for competition. If a competitor is not prepared and ready to compete within that 3 minute time frame, they will
receive a score of zero (0) for that run.
2. Once the competitor is ready to compete, they must notify the Head Judge that they are ready by either verbal
communication (if outside the vehicle), a “thumbs up” sign or honking the horn, signifying that they are ready.
3. Once the competitor notifies the Head Judge that they are ready, the Head Judge will begin the countdown and signal the
competitor by raising their hand in the air with all five fingers extended. A “5-4-3-2-1, fingers to fist” countdown will
indicate to the competitor that the countdown has begun. When the Head Judge points at the competitor after the
countdown, this indicates that the 30 second timer has started; the competitor then has that time in which to achieve their
highest SPL score. At the 10 seconds left mark, the Head Judge will lift their arm half way with a closed fist; at the 5
seconds left mark, the Head Judge will extend his fingers from the fist and begin a “5-4-3-2-1 fingers to fist” countdown,
indicating the last 5 seconds of the run. Once the run is complete, the Head Judge will do a sweeping, flat hand gesture and
a “thumbs up” to indicate the run is over and official. If the Head Judge uses a flat hand sweeping gesture but does not give
a “thumbs up” at any time during the run, this will indicate to the competitor that the run is over and that there is an
issue that has to be dealt with. The Head Judge will then confer with the other judges and the competitor in regards to the
potential issue.
IdBL COMPETITION PROCEDURES
IdBL GENERAL POLICIES AND PROCEDURES (cont.)
IdBL - 7
4. It is the competitor’s responsibility to ensure that they have a clear view of the Head Judge, while in the competition
lane. They are responsible to ensure that nothing interferes with their view of the Head Judge before, during, and after the
run; this includes team members, manufacturer representatives, press, podiums, equipment, the vehicle or any part of the
vehicle (doors, panels, etc.).
5. During the competition run, all panels in or on the vehicle must be, and remain, securely closed and latched for the
duration of the run. The Inspection Judge will complete a final “walk around” of the vehicle to confirm that all panels are
securely latched and closed. If at anytime during the 30 seconds of the competition run a vehicle’s panel comes loose, opens
or is opened, the run will be disallowed and the competitor will receive a score of zero for that run, no exceptions.
6. Once the run is complete, the competitor has three (3) minutes to remove the vehicle from the competition lane from the
time the measuring device is removed from the vehicle. If the competitor’s vehicle is not moving out of the competition
lane within that 3 minute time frame, the run may be disallowed and they could receive a score of zero (0) for the run.
IdBL WORLD RECORD PROCDURES
IdBL records are reset on March 1st of each year. All standard procedures apply for an IdBL World Record Event as
they do in regular event competition, however there are a few additions to the procedures.
IASCA/IdBL World Records are achieved by exceeding the highest recorded IdBL World Record score in their class as of
that date, twice consecutively during regulation runs at a sanctioned IdBL World Record Event. The lower of the two Record
breaking scores will be considered the new official IdBL World Record. Records can only be set at events where an IASCA
Certified world record official is present.
Upon breaking the record in the first run, the competitor’s vehicle will be moved aside and inspected by IASCA officials, to
confirm that it meets with all rules and regulations in the competitor’s Division/Class. Prior to inspection, no one can touch the
vehicle, except IASCA officials. Once the inspection is complete, the officials will validate the vehicle and notify the
competitor. The competitor has until they are called up for their next run to prepare the vehicle for the second run (charge
batteries, etc…). If the competitor “backs up” their first run with a second score higher than the current IdBL World Record,
IASCA officials as previously described will reinspect the vehicle. Once the inspection is complete and everything is in order,
the record will be official and will be recorded as such.
NOTE: World Record attempts can only be recorded on an approved Official IASCA AC-3056 meter with the AudioControl
SPL-190 sensor. An IASCA Certified World Record Judge must be present during the run to officiate and all rules and
procedures must be strictly adhered to. Any violation of any IdBL rule, regulation, policy or procedure will result in
disqualification of the record.
PROCEDURES FOR A SHOW HOST/PROMOTER
An IASCA Event Sanctioning Form for an IdBL World Record Event must be completed by the Show Host/Promoter and sent
to head office a minimum of 30 days prior to the event. The IdBL World Record event and regular event sanctioning fees
must be paid in full upon application.
An IASCA/IdBL Certified World Record Judge must be present to officiate any IdBL World Record Event. The Certified
World Record Judge will supply the meter to be used for the World Record attempts. Each Certified World Record Judge owns
an IASCA approved AudioControl AC-3056 SPL meter with an SPL-190 sensor, which is registered to them. These
meters are the only meters approved to certify IdBL World Records.
During registration, each competitor attempting to match or break an IdBL World Record must complete an Official IdBL score
sheet and sign it. Without this sheet, the score is not valid. All required information on the score sheet must be filled in and
the score sheet must be signed by the competitor, most importantly with their name and membership number. The white
copy of the score sheet must be sent in to the IASCA head office for our records within 14 days of the event taking place.
If an IdBL World Record is broken, a copy of the IdBL World Record Verification Form must be completed and sent in to the
IASCA head office along with the score sheet, or ahead of time by electronic format (email only). It is the responsibility of the
IdBL WORLD RECORD PROCEDURES
IdBL COMPETITION PROCEDURES (cont.)
IdBL - 8
Head Judge (IdBL World Record Certified Judge) to fill out this form and forward it to the IASCA Worldwide Inc. head office.
It is the Show Host/Promoter’s responsibility to send in the white copy of the competitor’s score sheet for confirmation. These
forms must be sent in to the IASCA head office within 14 days of the event taking place. If the score sheets and results are not
received within that time frame, the score will not be recognized.
All IASCA IdBL World Record Event Hosts and Affiliates must verify the competitor’s full name, address, competitor’s
membership number, vehicle and equipment information on the score sheet and World Record Verification Form and that
the forms are sent to the IASCA Worldwide Inc. Head Office. These sheets must also include the name of the IdBL World
Record Certified Judge and their judge’s number. If this information is not included, the competitor’s score will not be
recognized as a World Record.
JUDGING PROCEDURE
Judging Team – The IdBL Judging Team will consist of a minimum of 2 (two) judges; the World Record Certified Judge
(Head Judge) who will be in charge of operating the AudioControl meter and an Inspection Judge, who will be in charge of
positioning the sensor and visually inspecting the sensor, the vehicle and the competitor during the 30 second run. Additional
judges are allowed; they may take over some of the duties of the Inspection Judge as approved by the Head Judge, but are not
necessary to validate an IdBL World Record attempt.
Time Frame to achieve a World Record – In order for an IdBL World Record to be official, a competitor must beat the
current the World Record score twice during regulation runs; the runs must be within one half hour of each other. IdBL World
Records must be set during regulation runs (the allowed number of runs for that event); in the case of an event that allows only
one run, one (1) additional run may be approved for the purpose of attempting the World Record, no more.
If an IdBL World Record is broken, the three (3) minute time frame for teardown may be extended to allow the competitor time
for photo opportunities or other celebratory items. The time extension is at the discretion of the IdBL Certified World Record
Judge or the event Head Judge.
Breakdowns for competitors attempting an IdBL World Record– In the case of a breakdown, it is the competitor’s
responsibility to notify the IdBL Head Judge immediately of the breakdown, especially if additional time is required to repair
the breakdown. If the repairs cannot be completed during the regulation specified time frame , the competitor can request an
extension of the time frame from the IdBL Head Judge only and they may grant the extension based on the situation. The
maximum extension an IdBL Head Judge can grant will be fifteen (15) minutes, no exceptions. If the repairs cannot be
completed within that extension, the competitor will not be allowed to complete that run and will receive a score of zero (0) for
that run.
Competitors and their vehicles must comply with all the rules and regulations set forth in the IASCA/IdBL rulebook. Any
infraction of the rules will automatically rescind any IdBL World Record set. If an infraction is discovered after the event
at any time, the competitor’s score (and World Record) will be revoked. It is the competitor’s responsibility to ensure that
their score sheet is signed and all pertinent information has been recorded. A copy of the Official IdBL score sheet is available
to the competitor and it is the responsibility of the competitor to secure a copy of that score sheet for their records.
MEASUREMENT EQUIPMENT
The official meter for use at IASCA sanctioned competitions is the IASCA AC-3056 with the AudioControl SPL-190 sensor. It
is the only meter that can be used at TKE events (Territorial Key or Triple Point Events) and the only meter and sensor
combination allowed to record IdBL World Record attempts when the event is officiated by an authorized IASCA IdBL World
Record Judge. Other AudioControl RTA/SPL Meters are permissible at single point (SPE) and Double Point (DPE) events.
Other brands of SPL meter systems can be used at SPE events if authorized by the IASCA Head Office in South Daytona,
Florida.
SENSOR / MICROPHONE PLACEMENT GUIDELINES
The event judge/s must ensure that the measuring device height and orientation are absolutely consistent from vehicle to
vehicle. The measuring device must face towards the front of the vehicle at all times. The position is as follows for all measuring
devices used in IdBL competition; 4 inches up from the top of the dashboard and 12 inches over from the OEM passenger side
"A" pillar.
IdBL MEASUREMENT PROCEDURE
IdBL WORLD RECORD PROCEDURES (cont.)
IdBL - 9
This is accomplished by using the IASCA certified placement jig (see diagram above). For the SPL-190 sensor, the jig must be
positioned against the windshield with the base of the jig (A) touching the top of the dashboard and the far right of the jig (B)
touching the passenger side “A” pillar. The sensor is then positioned in the top left opening (C), placing the opening of the
sensor in the "4 and 12" position. The cable attached to the sensor must be at the bottom of the sensor when in its final position,
not to one side or on top.
Once the measuring device is positioned, the competitor will have the opportunity to verify it has been positioned properly.
The competitor is not allowed to touch the measuring device once it is positioned, however if they feel it is not properly placed,
they can request that it be repositioned and the judge is required to do so. Note: If the competitor requests that the measuring
device be repositioned, this does not give the competitor an extension on the 3 minute preparation time set out before being
judged. Once the measuring device has been positioned for the first time in the run, the 3 minute countdown will begin.
If the judging staff experiences an equipment failure (with either the meter, measuring device or cable) during the competitor’s
run, the score in that run will not count and the competitor will have the option of rerunning within a specified time period.
The intent of the Rookie Division is to give newcomers and local competitors a place to compete without the worry of having
seasoned IdBL veterans coming in and taking all the “top spots”. It allows newcomers and local competitors to compete in
IASCA IdBL competition and learn what IdBL is all about.
Veteran competitors are encouraged to assist Rookie competitors in increasing their knowledge of SPL competition.
• Competitors are allowed to compete in the Rookie Division for one year only; after one year, competitors must move up to
one of the higher IdBL Divisions. Competitors may petition IASCA to extend their Rookie term if they have competed at 3
shows or less in their first season. IASCA reserves the right to approve or deny the petition.
• Competitors can not have received any schooling or accredited education in the mobile electronics industry (e.g. car audio
installation schools) at any time prior to or during their Rookie year.
• Competitors cannot derive any income or support from any facet of the mobile electronics industry or any of its affiliations
during their Rookie year; including, but not limited to the sales, installation, manufacturing, design, testing or engineering
of autosound products.
• Competitors cannot derive any income or support from the publishers of any mobile electronics magazine during their
IdBL ROOKIE DIVISION
ROOKIE DIVISION - COMPETITOR CRITERIA
A
C B
IdBL SENSOR JIG SPECIFICATIONS
IdBL MEASUREMENT PROCEDURE (cont.)
IdBL - 10
Rookie year, including but not limited to print and internet publications.
• Competitors cannot derive any income or support from the participation in or arranging of autosound and/or similar style
competitions, sanctioned or unsanctioned during their Rookie year.
• Competitors operating their sound system from inside the vehicle while competing must operate the system from the
standard driver’s seat seating position. Competitors must be seated as if they were driving the vehicle; no other seating
position is acceptable.
• Competitors are allowed to have up to six (6) “co-pilots” assisting them while competing in the competition lanes. If the copilots
are assisting by holding down panels on the vehicle, the co-pilots must have both feet on the ground at all times
during testing. Co-pilots are not allowed to jump up on the trunk, hood or roof of the vehicle while it is being tested.
• Competitors must completely fill out and sign their Official IdBL score sheet. Failure to do so will result in the loss of any
accrued IASCA CAP points from the event, no exceptions.
• Competitors can not have been a member of IASCA or any other autosound competition organization prior to becoming a
Rookie member of IASCA.
1. All vehicles in the IdBL Rookie Division must remain OEM stock. External and internal aftermarket add-ons such as body
kits, wings, wheels, aftermarket seats, steering wheels or any automotive related cosmetic and performance items not
related to the vehicle’s 12 volt electrical system are allowed.
2. Vehicles must be driven to the event under their own power and not towed or trailered in. Vehicles must also be able to be
driven in to the competition lane under its own power.
3. OEM covering (carpeting) in the trunk or hatch or interior area (e.g. carpet, panels, etc.) must remain intact in the vehicle
during testing. OEM factory carpeting or covering may be replaced with an aftermarket equivalent that approximates an
OEM factory appearance.
4. All OEM panels and components in the vehicle must remain in their factory mounted location (e.g. rear deck trim panels,
door panels, headliners, dashboards, seats, seat belts, etc.). Exception: panels that are designed to be removable, such as the
parcel shelf panel in some hatchbacks, can be removed. The general rule of thumb is if the vehicle manufacturer designed
the item to be removable, it can be removed; if the item is designed to be fixed in place, it may not be removed. Any issues
regarding the intent of the manufacturer with an item will be decided by event officials and their decision will be final.
5. All OEM factory windows in the vehicle designed by the manufacturer to be operational, must be able to function as the
manufacturer intended them to and nothing can impede their proper operation. OEM glass may not be replaced with any
transparent substitute material.
6. No panels or sheet metal in the vehicle can be modified so as to increase the SPL level of the vehicle. All sheet metal, steel,
plastic, wood and any other materials used by the manufacturer to build the vehicle must remain intact and unaltered, with
the following exceptions; door panel build outs and kick pods built to house operational speakers the purpose of increasing
sound quality only and/or panel modifications for cosmetic purposes will be allowed. Build outs designed for the purpose of
increasing SPL will not be allowed. It is at the discretion of the IASCA event official/s to determine the intent of the build
outs; their decision will be final.
7. Competitors are not allowed to have any panels, covers or tinting blocking the view to the inside of the vehicle during
testing. Window tinting is acceptable, so long as it does not impede the judge’s view of any component of the measuring
equipment during testing. If any panel, covering or tinting is deemed to block the view of the measuring equipment and/or
is unacceptable by an IASCA Certified Judge during an event, the competitor will be asked to remove the item/s so as to not
impede the view to the interior of the vehicle. Refusal to do so may result in disqualification from the event.
8. Any modification to a vehicle that is not covered in this section will be considered illegal in Rookie competition and must
be approved by the IASCA Head Office before being allowed in competition.
8. Vehicles that are not allowed to compete in Rookie Division include, but are not limited to; limousines, conversion vans,
ambulances, buses, delivery trucks and/or vans (cube vans), motorhomes, armored cars and/or any other vehicle that has
been built or modified by someone other than an automobile manufacturer. If there is a question as to the legality of a
vehicle in Rookie competition, the decision will fall to the IASCA Head Office and that decision will be final. If a vehicle
in question attends an event to participate, the event officials are instructed to allow the vehicle to compete and after the
event, send the information to the IASCA Head Office to be reviewed for the decision. If the vehicle is found to be illegal
for competition in the Rookie Division, it will be reclassified and the competitor, officials and event host will be notified
immediately. Vehicle and competitor positioning and CAP points will be adjusted for that event.
IdBL ROOKIE DIVISION (cont.)
ROOKIE DIVISION - VEHICLE CRITERIA
IdBL - 11
All equipment used in the Rookie Division must be commercially available through standard retail channels (retailer,
box store, etc.). Equipment used cannot be modified in any way.
Competitors in Rookie Division must be able to provide proof that their equipment was purchased through standard retail
channels (e.g. sales receipt, credit card receipt, cancelled check, etc.), if so requested by any IASCA official.
SOFTWARE
• Competitors must play music only from approved commercially available media. IASCA considers CD as its main
media format for use in competition; alternate media (such as MP3) may also be used in competition if the event host offers
it. For a detailed explanation on what is considered “Alternate Media”, go to page SQ-4 “Software Use in IASCA
Competition” in the rule book.
• Test tones or sine sweeps are not allowed in Rookie Division competition.
SOURCE UNITS
• CD source (head) units, iPods, MP3 & Zune players, DAT, mini disc, hard drives, etc. are acceptable for Rookie Division
competition. Formats other than CD may not be available at all events.
• The source unit must be mounted properly and securely in the factory OEM radio location of the vehicle when entering or
exiting the competition lane. NOTE: in cases where the vehicle’s SPL score exceeds 150 dB, the source unit must be
operated from outside the vehicle by remote control. Source Units in Rookie Class cannot be removed from their mounted
location.
AMPLIFIERS
• Competitors in Rookie Division are limited to one amplifier per pair of subwoofers.
• One amplifier means that all amplifier components must be encased within one heatsink. “Strapping” multiple amplifiers
together as “one” is not considered as one amplifier.
• Amplifiers must be safely and securely mounted in the vehicle.
SUBWOOFERS/SPEAKERS
• The Rookie Division is limited to subwoofers with single or dual voice coils only; “Quad coil” subs are not allowed.
• Subwoofers must be mounted safely and securely in the vehicle and/or subwoofer enclosure (sub box).
• All subwoofers must be mounted in the OEM cargo area of the vehicle. Speakers and/or subwoofers mounted in the
interior of the vehicle, installed with the intent of increasing SPL levels below 100 Hz, will be deemed as part of the SPL
system and the vehicle will be reclassified to a higher Division/Class.
PROCESSORS
• All types of processors/line drivers/crossovers/equalizers are allowed in IdBL competition, so long as they fit all criteria for
competition and are powered by the vehicle’s 12 volt charging system.
SOUND DEADENING
• Sound deadening (or dampening) materials may be used behind or inside any factory OEM panels, so long as the factory
panel remains intact, unaltered and in its original factory OEM location.
SUBWOOFER ENCLOSURE/S
• Subwoofer enclosures (or Sub boxes) can be either pre-fabricated (store bought) or custom made enclosures.
• Subwoofer enclosures must be safely and securely mounted in the cargo area of the vehicle; they cannot be sitting loose.
• The subwoofer enclosure cannot have a seal or gasket around it, creating a seal between the interior and cargo area (e.g.
fiberglass cover around opening between interior and cargo area, sealing off the cargo area from the interior).
• The subwoofer enclosure cannot exceed 25 inches in height from the OEM floor of the cargo area to the top of the
enclosure. This includes any “supports” or “legs” that prop up the enclosure and any components attached to the
enclosure (amplifiers, subwoofer basket/surround, power distribution block, etc.). If any part of the enclosure utilizes the
spare tire well area of the cargo area, the 25 inch height measurement will be taken from the bottom of the spare tire well.
• Walls are not allowed in Rookie Division.
PORTS
• Ports can be either store bought generic plastic ports or square/rectangular ports built into the enclosure. Store bought
“flared” ports, or flared ports built in to a pre fabricated enclosure are acceptable.
• The use of ABS or PVC plumbing pipe, or any similar types of porting/tubing not specifically designed for car audio use, is
not allowed.
• Square/rectangular ports must be part of the enclosure and fixed to the enclosure (no adjustable ports allowed, round or
square/rectangular).
• All styles of ports are limited to 14 square inches of port surface per subwoofer (maximum 4” round port). Ports can be any
length.
ROOKIE DIVISION - EQUIPMENT CRITERIA
IdBL - 12
WIRING/CONNECTIONS/FUSING
• The maximum size power and ground wiring allowed in the Rookie Division is 0 gauge wire. One (1) “run” of power wire
and one (1) run of ground wire is allowed from the battery to the amplifier/distribution block.
• IASCA recommends that all wiring for electronics be fused at the power source.
ELECTRICAL SYSTEM
• Maximum allowed voltage (vehicle running or off) is 15.5 volts.
• The vehicle’s OEM factory style alternator must remain intact and unmodified, in its OEM factory location.
• Additional alternators and/or voltage regulators are not allowed.
• Vehicle electrical wiring (starter/alternator/body ground) may be upgraded to the maximum allowable size of wire in
Rookie Division.
BATTERIES
• Only one battery is allowed in Rookie Division.
• Battery must be a standard automotive 12 volt battery.
• The battery must be mounted in its factory OEM location.
• The battery may be upgraded, but the upgraded battery must fit in the OEM factory battery location, with no modifications
to the battery, the battery mounting tray or the vehicle itself. Modifications to the OEM factory battery tray or the vehicle
will cause the competitor to be reclassified in a higher Division, based on the extent of the modifications.
CAPACITORS
• Up to 5 farads of capacitance is allowed in the Rookie Division.
• Competitors may use a single 5 farad capacitor or a multiple of capacitors totaling 5 farads.
• All capacitors must be safely and securely mounted in the vehicle.
SAFETY EQUIPMENT
If a competitor chooses not to abide by the IASCA Worldwide Inc. recommendation to fuse all electronics at the source of
power, whereas serious damage or injury to products, vehicles and/or people is possible, it is advised to keep an “A-B-C”
rated fire extinguisher at the ready. Consult your local fire department for more information about fire extinguishers.
The intent of the Stock Division is provide a progression for Rookie Division competitors that have gained a greater knowledge
of, or for those who have a greater knowledge of, SPL and competition than the average consumer. Stock Division competitors
typically use their “daily driver” vehicles as their competition vehicles.
• Competitors in Stock Division cannot derive any income or support from any facet of the mobile electronics industry or any
of its affiliations, including, but not limited to the sales, installation, manufacturing, design, testing or engineering of
mobile electronics products.
• Competitors in Stock Division cannot derive any income or support from the publishers of any mobile electronics
publications, including but not limited to television, radio, print and internet publications.
• Competitors that are part of a manufacturer’s competition team cannot receive any support in the way of free product from
the manufacturer as this is considered sponsorship.
• Competitors in Stock Division must be able to provide proof that their equipment was purchased through standard retail
channels (e.g. sales receipt, credit card receipt, cancelled check, etc.), if so requested by any IASCA official.
• Competitors operating their sound system from inside the vehicle while competing must operate the system from the
standard driver’s seat seating position. Competitors must be seated as if they were driving the vehicle; no other seating
position is acceptable.
• Competitors are allowed to have up to six (6) “co-pilots” assisting them while competing in the competition lanes. If the copilots
are assisting by holding down panels on the vehicle, the co-pilots must have both feet on the ground at all times
during testing. Co-pilots are not allowed to jump up on the trunk, hood or roof of the vehicle while it is being tested.
• Competitors must completely fill out and sign their Official IdBL score sheet. Failure to do so will result in the loss of any
accrued IASCA CAP points from the event, no exceptions.
IdBL STOCK DIVISION
STOCK DIVISION - COMPETITOR CRITERIA
ROOKIE DIVISION - EQUIPMENT CRITERIA (CONT.)
IdBL - 13
1. All vehicles in the IdBL Stock Division must remain OEM stock. External and internal aftermarket add-ons such as body
kits, wings, wheels, aftermarket seats, steering wheels or any automotive related cosmetic and performance items not
related to the vehicle’s 12 volt electrical system are allowed.
2. Vehicles must be driven to local events (within a 100 mile radius) under their own power and not towed or trailered in.
Vehicles must also be able to be driven in to the competition lane under their own power.
3. All OEM panels and components in the vehicle must remain in their factory mounted location (e.g. rear deck trim panels,
door panels, headliners, dashboards, seats, seat belts, etc.). Exception: panels that are designed to be removable, such as the
parcel shelf panel in some hatchbacks, can be removed. The general rule of thumb is if the vehicle manufacturer designed
the item to be removable, it can be removed; if the item is designed to be fixed in place, it may not be removed. Any issues
regarding the intent of the manufacturer with an item will be decided by event officials and their decision will be final.
4. All OEM factory windows in the vehicle designed by the manufacturer to be operational, must be able to function as the
manufacturer intended them to and nothing can impede their proper operation. OEM glass may not be replaced with any
transparent substitute material.
5. No panels or sheet metal in the vehicle can be modified so as to increase the SPL level of the vehicle. All sheet metal, steel,
plastic, wood and any other materials used by the manufacturer to build the vehicle must remain intact and unaltered, with
the following exceptions; door panel build outs and kick pods built to house operational speakers the purpose of increasing
sound quality only and/or panel modifications for cosmetic purposes will be allowed. Build outs designed for the purpose
of increasing SPL will not be allowed. It is at the discretion of the IASCA event official/s to determine the intent of the
build outs; their decision will be final.
6. Competitors are not allowed to have any panels, covers or tinting blocking the view to the inside of the vehicle during
testing. Window tinting is acceptable, so long as it does not impede the judge’s view of the interior and any component of
the measuring equipment during testing. If any panel, covering or tinting is deemed to block the view of the measuring
equipment and/or is unacceptable by an IASCA Certified Judge during an event, the competitor will be asked to remove the
item/s so as to not impede the view to the interior of the vehicle. Refusal to do so may result in disqualification from the
event.
7. All OEM factory seals and gaskets must be in place on all functional panels (including but not limited to; doors, trunk,
hatches, glass, etc.). For older vehicles where the OEM factory replacements may not be available, an aftermarket
equivalent may be used in its place. If an aftermarket equivalent is used, competitors must notify the IASCA Officials at the
event as to its use. The IASCA Officials will inspect the equivalent to determine if it is used for that purpose, or for the
purpose of increasing SPL.
8. Pickup trucks with “cut throughs” from the bed to the cab are not allowed to compete in Stock Division
9. All equipment must be mounted in the OEM cargo area of the vehicle in Stock Division, with the exception of regular cab,
extended (king) cab and crew cab trucks (see rule #10). For clarification purposes in the case of SUV’s and minivans, the
cargo area is considered as the area directly behind the second row of seating in the vehicle. If the vehicle is equipped with a
third row (or more) of seating, it will not affect the positioning of the enclosure so long as the enclosure remains behind
the second row of seating. Third row (or more) seating only may be removed from the vehicle for competition, but the
second row seating must remain intact and securely fastened in the vehicle (emulates a 4-5 passenger vehicle).
10. Regular cab, extended (king) cab and crew cab trucks are allowed to compete in Stock Division so long as they do not have
a “cut through” from the bed to the cab. These vehicles are the only vehicles where equipment and enclosures are allowed
to be mounted in the passenger compartment of the vehicle;. There are certain guidelines for competitors with these
vehicles; REGULAR CAB TRUCKS (Compact and Full Size) - The subwoofer enclosure must be mounted to the rear
wall of the cab and no taller than 25 inches in height (see equipment criteria for Stock Division) from the cab floor. The
enclosure cannot impede the full operation of the seat and seat travel must remain intact. EXTENDED (KING) AND
CREW CAB TRUCKS (Compact and Full Size) - The subwoofer enclosure can be mounted in the rear “seat” or passenger
area of the vehicle, but the enclosure depth cannot exceed 20 inches. Additionally, the enclosure must be mounted to the
rear wall of the cab and no taller than 25 inches in height from the cab floor. The enclosure cannot impede the full
operation of the seat and seat travel must remain intact.
11. Vehicles equipped with OEM factory “fold down” rear seats may be folded down during testing; however, the seat must
maintain full functionality and nothing may impede its proper operation. In other words, when the seat is in its folded
position, it must be able to open and close properly with the enclosure in its “competition” position. Extended Cab and
Crew Cab trucks are exempt from this rule.
12. The vehicle must have the factory OEM dashboard in place, intact and unmodified from its original design. All accessories/
gauges/switches in the dashboard must remain functional. The only additions allowed to an OEM dashboard are the painting
of “snap in” panels on the dashboard and speakers for improving sound quality only.
13. Aftermarket and/or custom center consoles are allowed in IdBL Stock Division competition, but said console/s must be
securely mounted and functional. “Functional” means that the console must provide storage for accessories and/or house
functional electronic equipment. If in the opinion of the IASCA official, the console is designed for the purpose of
STOCK DIVISION - VEHICLE CRITERIA
IdBL - 14
increasing SPL, they may reclassify the competitor to a higher Division. Any aftermarket or custom console installed in a
Stock Division vehicle cannot extend in height past the bottom of the steering wheel. In the case of vehicles equipped with
tilt steering, the steering wheel will be positioned perpendicular to the steering column to take the measurement.
14. No additional brackets or holders may be attached to the vehicle in any way, or anywhere, on the vehicle, for the purpose of
housing additional equipment of any type. The complete vehicle (exterior and interior) must maintain its OEM factory
look.
15. Nothing in the vehicle may interfere with the correct placement of the measuring device and its placement jig.
16. Any modification to a vehicle that is not covered in this section will be considered illegal in Stock Division competition and
must be approved by the IASCA Head Office before being allowed in competition.
17. All seats must remain in the vehicle during testing in Stock Division.
18. Vehicles that are not allowed to compete in Stock Division include, but are not limited to; limousines, conversion vans,
ambulances, buses, delivery trucks and/or vans (cube vans), motorhomes, armored cars and/or any other vehicle that has
been built or modified by someone other than an automobile manufacturer. If there is a question as to the legality of a
vehicle in Stock Division competition, the decision will fall to the IASCA Head Office and that decision will be final. If a
vehicle in question attends an event to participate, the event officials are instructed to allow the vehicle to compete and after
the event, send the information to the IASCA Head Office to be reviewed for the decision. If the vehicle is found to be
illegal for competition in the Stock Division, it will be reclassified and the competitor, officials and event host will be
notified immediately. Vehicle and competitor positioning and CAP points will be adjusted for that event.
All equipment used in the Stock Division must be commercially available through standard retail channels (retailer, box
store, etc.). Equipment used can not be modified in any way.
SOFTWARE
• Competitors may use any approved commercially available media. IASCA considers CD as its main media format for
use in competition; alternate media (such as MP3) may also be used in competition if the event host offers it. For a detailed
explanation on what is considered “Alternate Media”, go to page SQ-4 “Software Use in IASCA Competition” in the rule
book.
• Competitors may use test tones and/or sine sweeps for competition in Stock Division.
SOURCE UNITS
• CD source (head) units, iPods, MP3 & Zune players, DAT, mini disc, hard drives, etc. are acceptable for IdBL Stock
Division competition. Formats other than CD may not be available at all events.
• The source unit must be mounted properly and securely in the factory OEM radio location of the vehicle. The source unit
used may be removed and replaced from its factory location for the purpose of competing, but only once the vehicle has
entered the lanes.
AMPLIFIERS
• Competitors in Stock Division are limited to one amplifier per subwoofer.
• One amplifier means that all amplifier components must be encased within one heatsink. “Strapping” multiple amplifiers
together as “one” is not considered as one amplifier.
• Amplifiers must be safely and securely mounted in the vehicle.
SUBWOOFERS/SPEAKERS
• All types of subwoofers are allowed in Stock Division competition, as long as they fit all other criteria specified for
equipment.
• Subwoofers must be mounted safely and securely in the vehicle and/or subwoofer enclosure (sub box).
• All subwoofers must be mounted in the OEM cargo area of the vehicle in Stock Division. Speakers and/or subwoofers
mounted in the interior of the vehicle, installed with the intent of increasing SPL levels below 100 Hz, will be deemed as
part of the SPL system and the vehicle will be reclassified to a higher Division/Class.
PROCESSORS
• All types of processors/line drivers/crossovers/equalizers are allowed in IdBL competition, so long as they fit all criteria for
competition and are powered by the vehicle’s 12 volt charging system.
CAPACITORS
• Up to 10 farads of total capacitance is allowed in Stock Division.
• Competitors may use a single capacitor or a multiple of capacitors totaling 10 farads. All capacitors must be safely and
securely mounted in the vehicle.
STOCK DIVISION - VEHICLE CRITERIA (cont.)
STOCK DIVISION - EQUIPMENT CRITERIA
IdBL - 15
SUBWOOFER ENCLOSURE/S
• Subwoofer enclosures (or Sub boxes) can be either pre-fabricated (store bought) or custom made enclosures.
• Subwoofer enclosures must be safely and securely mounted in the cargo area of the vehicle; they cannot be sitting loose.
• Subwoofer enclosures can have a seal or gasket creating a seal between the interior and cargo area (e.g. fiberglass cover
around opening between interior and cargo area, sealing off the cargo area from the interior).
• The subwoofer enclosure cannot exceed 25 inches in height from the OEM floor of the cargo area to the top of the
enclosure. This includes any “supports” or “legs” that prop up the enclosure and any components attached to the
enclosure (amplifiers, subwoofer/basket/surround, power distribution block, etc.). If any part of the enclosure utilizes the
spare tire well area of the cargo area, the 25 inch height measurement will be taken from the bottom of the spare tire well.
• Walls are not allowed in Stock Division.
PORTS
• All port styles and designs are allowed in Stock Division.
• ABS or PVC plumbing pipe, flared ports or any similar non standard porting is allowed.
WIRING/CONNECTIONS/FUSING
• The maximum size power and ground wiring allowed in Stock Division is 1/0 gauge wire. One (1) “run” of power wire
and one (1) run of ground wire per amplifier is allowed from the battery/ies to the additional battery/amplifier/distribution
block.
• IASCA recommends that all wiring for electronics be fused at the power source.
ELECTRICAL SYSTEM
• Maximum allowed voltage (vehicle running or off) is 15.5 volts.
• The vehicle’s OEM factory style alternator can be upgraded from its original OEM factory output only. Larger alternators in
physical size and/or shape are not allowed.
• Additional alternators are not allowed.
• If used, the upgraded alternator must be mounted in the factory OEM location of the original factory OEM alternator.
• Vehicle electrical wiring (starter/alternator/body ground) may be upgraded to the maximum allowable size of wire in
Stock Division.
• Outboard adjustable voltage regulators on alternators are allowed, however the controls for the voltage regulator must be
mounted in an accessible location while operating the system, for safety reasons.
BATTERIES
• Two (2) batteries total are allowed in Stock Division. This includes the vehicle’s main battery.
• Batteries must be standard 12 volt batteries; variations of individual or multiple battery cells equaling 12 volts are not
allowed (e.g. two 6 volt batteries connected in series or six two volt batteries connected the same way). Each individual
battery will be counted as an individual battery, no matter what the voltage.
• One battery must be mounted in the factory OEM battery location.
• The batteries may be upgraded.
• Both batteries must be no larger than 1,200 cubic inches of volume each. To calculate battery volume, multiply the length,
width and height (in inches) together (L x W x H= Total battery volume in cubic inches) to determine volume.
• Batteries must be commercially available through standard retail channels (auto supply store, battery supplier, etc.)
• Both batteries must be connected to the vehicle’s 12 volt charging system and properly fused, and cannot operate
independently from the vehicle’s factory OEM charging system.
• Any and all batteries in the vehicle, whether connected to the vehicle or vehicle’s charging system or not, will be counted as
part of the system and the vehicle will be classified as having that amount of batteries.
• The additional battery must be mounted and securely fastened in the OEM cargo area of the vehicle; batteries are not
allowed in the passenger area (interior) of the vehicle, whether connected or not, during testing.
• Non sealed, automotive style batteries mounted in the OEM cargo area must be enclosed and vented to the outside of the
vehicle.
SOUND DEADENING
• Sound deadening (or dampening) materials may be used behind or inside any factory OEM panels, so long as the factory
panel remains intact, unaltered and in its original factory OEM location.
SAFETY EQUIPMENT
If a competitor chooses not to abide by the IASCA Worldwide Inc. recommendation to fuse all electronics at the source of
power, whereas serious damage or injury to products, vehicles and/or people is possible, it is advised to keep an “A-B-C”
rated fire extinguisher at the ready. Consult your local fire department for more information about fire extinguishers.
STOCK DIVISION - EQUIPMENT CRITERIA (cont.)
IdBL - 16
The intent of Stock Pro Division is to provide a progression for Rookie and Stock Division competitors as they gain knowledge
in building SPL systems and upgrade their equipment. It is designed for “veteran” competitors who have gained substantial
knowledge during their tenure in the lower Divisions. These competitors will typically still use their

1. All vehicles in the IdBL Stock Pro Division must remain OEM stock. External and internal aftermarket add-ons such as
body kits, wings, wheels, aftermarket seats, steering wheels or any automotive related cosmetic and performance items not
related to the vehicle’s 12 volt electrical system are allowed.
2. Vehicles must be driven to local events (within a 100 mile radius) under their own power and not towed or trailered in.
Vehicles must also be able to be driven in to the competition lane under their own power.
3. All OEM panels and components in the vehicle must remain in their factory mounted location (e.g. rear deck trim panels,
door panels, headliners, dashboards, seats, seat belts, etc.). Exception: panels that are designed to be removable, such as the
parcel shelf panel in some hatchbacks, can be removed. The general rule of thumb is if the vehicle manufacturer designed
the item to be removable, it can be removed; if the item is designed to be fixed in place, it may not be removed. Any issues
regarding the intent of the manufacturer with an item will be decided by event officials and their decision will be final.
4. All OEM factory windows in the vehicle designed by the manufacturer to be operational, must be able to function as
the manufacturer intended them to and nothing can impede their proper operation. OEM glass may not be replaced with
any transparent substitute material.
5. No panels or sheet metal in the vehicle can be modified so as to increase the SPL level of the vehicle. All sheet metal,
steel, plastic, wood and any other materials used by the manufacturer to build the vehicle must remain intact and unaltered,
with the following exceptions; door panel build outs and kick pods built to house operational speakers the
purpose of increasing sound quality only and/or panel modifications for cosmetic purposes will be allowed. Build outs
designed for the purpose of increasing SPL will not be allowed. It is at the discretion of the IASCA event official/s to
determine the intent of the build outs; their decision will be final.
6. Competitors are not allowed to have any panels, covers or tinting blocking the view to the inside of the vehicle during
testing. Window tinting is acceptable, so long as it does not impede the judge’s view of the interior and any component of
the measuring equipment during testing. If any panel, covering or tinting is deemed to block the view of the measuring
equipment and/or is unacceptable by an IASCA Certified Judge during an event, the competitor will be asked to remove
the item/s so as to not impede the view to the interior of the vehicle. Refusal to do so may result in disqualification from the
event.
7. All OEM factory seals and gaskets must be in place on all functional panels (including but not limited to; doors, trunk,
hatches, glass, etc.)
8. Pickup trucks with “cut throughs” from the bed to the cab are allowed to compete in Stock Pro Division.
9. All equipment (Except source unit and speakers for sound quality) must be mounted in the OEM cargo area of the vehicle in
Stock Pro Division, with the exception of regular cab, extended (king) cab and crew cab trucks (see rule #10). For
clarification purposes in the case of SUV’s and minivans, the cargo area is considered as the area directly behind the second
row of seating in the vehicle. If the vehicle is equipped with a third row (or more) of seating, it will not affect the
positioning of the enclosure so long as the enclosure remains behind the second row of seating. Third row (or more) seating
only may be removed from the vehicle for competition, but the second row seating must remain intact and securely fastened
IdBL STOCK PRO DIVISION
STOCK PRO DIVISION - COMPETITOR CRITERIA
STOCK PRO DIVISION - VEHICLE CRITERIA
IdBL - 17
in the vehicle (emulates a 4-5 passenger vehicle).
10. Regular cab, extended (king) cab and crew cab trucks are allowed to compete in Stock Pro Division even though they may
not have a “cut through” from the bed to the cab. These vehicles are the only vehicles where equipment and enclosures are
allowed to be mounted in the passenger compartment of the vehicle. There are certain guidelines for competitors with these
vehicles; REGULAR CAB TRUCKS (Compact and Full Size) - The subwoofer enclosure must be mounted to the rear
wall of the cab and no taller than 25 inches in height (see equipment criteria for Stock Division) from the cab floor. The
enclosure cannot impede the full operation of the seat and seat travel must remain intact. EXTENDED (KING) AND
CREW CAB TRUCKS (Compact and Full Size) - The subwoofer enclosure can be mounted in the rear “seat” or rear
passenger area of the vehicle, but the enclosure depth cannot exceed 20 inches. Additionally, the enclosure must be
mounted to the rear wall of the cab and no taller than 25 inches in height from the cab floor. The enclosure cannot impede
the full operation of the front seat and front seat travel must remain intact.
11. Vehicles equipped with OEM factory “fold down” rear seats may be folded down during testing; however, the seat must
maintain full functionality and nothing may impede its proper operation. In other words, when the seat is in its folded
position, it must be able to open and close properly with the enclosure in its “competition” position. Exception: Extended
cab or crew cab trucks may have the rear seat removed in order to house the subwoofer enclosure if the enclosure is
mounted in the rear seat area of the vehicle.
12. The vehicle must have the factory OEM dashboard in place, intact and unmodified from its original design. All accessories/
gauges/switches in the dashboard must remain functional. The only additions allowed to an OEM dashboard are the painting
of “snap in” panels on the dashboard and speakers for improving sound quality only.
13. Aftermarket and/or custom center consoles are allowed in IdBL Stock Pro Division competition, but said console/s must be
securely mounted and functional. “Functional” means that the console must provide storage for accessories and/or house
functional electronic equipment. If in the opinion of the IASCA official, the console is designed for the purpose of
increasing SPL, they may reclassify the competitor to a higher Division. Any aftermarket or custom console installed in a
Stock Pro Division vehicle cannot extend in height past the bottom of the steering wheel. In the case of vehicles equipped
with tilt steering, the steering wheel will be positioned perpendicular to the steering column to take the measurement.
14. No additional brackets or holders may be attached to the vehicle in any way, or anywhere, on the vehicle, for the purpose of
housing additional equipment of any type. The complete vehicle (exterior and interior) must maintain its OEM factory
look.
15. Nothing in the vehicle may interfere with the correct placement of the measuring device and its placement jig.
16. Any modification to a vehicle that is not covered in this section will be considered illegal in Stock Pro Division competition
and must be approved by the IASCA Head Office before being allowed in competition.
17. All seats must remain in the vehicle during testing in Stock Pro Division.
18. Vehicles that are not allowed to compete in Stock Pro Division include, but are not limited to; limousines, conversion vans,
ambulances, buses, delivery trucks and/or vans (cube vans), motorhomes, armored cars and/or any other vehicle that has
been built or modified by someone other than an automobile manufacturer. If there is a question as to the legality of a
vehicle in Stock Division competition, the decision will fall to the IASCA Head Office and that decision will be final. If a
vehicle in question attends an event to participate, the event officials are instructed to allow the vehicle to compete and after
the event, send the information to the IASCA Head Office to be reviewed for the decision. If the vehicle is found to be
illegal for competition in the Stock Pro Division, it will be reclassified and the competitor, officials and event host will be
notified immediately. Vehicle and competitor positioning and CAP points will be adjusted for that event.
All equipment used in the Stock Division must be commercially available through standard retail channels (retailer,
box store, etc.). Equipment used can not be modified in any way.
SOFTWARE
• Competitors may use any approved commercially available media. IASCA considers CD as its main media format for
use in competition; alternate media (such as MP3) may also be used in competition if the event host offers it. For a detailed
explanation on what is considered “Alternate Media”, go to page SQ-4 “Software Use in IASCA Competition” in the rule
book.
• Competitors may use test tones and/or sine sweeps for competition in Stock Pro Division.
SOURCE UNITS
• CD source (head) units, iPods, MP3 & Zune players, DAT, mini disc, hard drives, etc. are acceptable for IdBL Stock Pro
Division competition. Formats other than CD may not be available at all events.
• The source unit must be mounted properly and securely in the factory OEM radio location of the vehicle. The source unit
used may be removed and replaced from its factory location for the purpose of competing, but only once the vehicle has
entered the lanes.
STOCK PRO DIVISION - VEHICLE CRITERIA (cont.)
STOCK PRO DIVISION - EQIUPMENT CRITERIA
IdBL - 18
AMPLIFIERS
• Competitors in Stock Pro Division are limited to two amplifiers per subwoofer.
• One amplifier means that all amplifier components must be encased within one heatsink. “Strapping” multiple amplifiers
together as “one” is not considered as one amplifier.
• Amplifiers must be safely and securely mounted in the vehicle.
SUBWOOFERS/SPEAKERS
• All types of subwoofers are allowed in Stock Pro Division competition, as long as they fit all other criteria specified for
equipment.
• Subwoofers must be mounted safely and securely in the vehicle and/or subwoofer enclosure (sub box).
• All subwoofers must be mounted in the OEM cargo area of the vehicle in Stock Pro Division. Speakers and/or
subwoofers mounted in the interior of the vehicle, installed with the intent of increasing SPL levels below 100 Hz, will be
deemed as part of the SPL system and the vehicle will be reclassified to a higher Division/Class.
PROCESSORS
• All types of processors/line drivers/crossovers/equalizers are allowed in IdBL competition, so long as they fit all criteria for
competition and are powered by the vehicle’s 12 volt charging system.
CAPACITORS
• Up to 20 farads of total capacitance is allowed in Stock Pro Division.
• Competitors may use a single capacitor or a multiple of capacitors totaling 20 farads. All capacitors must be safely and
securely mounted in the vehicle.
SUBWOOFER ENCLOSURE/S
• Subwoofer enclosures (or Sub boxes) can be either pre-fabricated (store bought) or custom made enclosures.
• Subwoofer enclosures must be safely and securely mounted in the OEM cargo area of the vehicle; they cannot be sitting
loose.
• Subwoofer enclosures can have a seal or gasket creating a seal between the interior and cargo area (e.g. fiberglass cover
around opening between interior and cargo area, sealing off the cargo area from the interior).
• The subwoofer enclosure cannot exceed 25 inches in height from the OEM floor of the cargo area to the top of the
enclosure. This includes any “supports” or “legs” that prop up the enclosure and any components attached to the
enclosure (amplifiers, subwoofer/basket/surround, power distribution block, etc.). If any part of the enclosure utilizes the
spare tire well area of the cargo area, the 25 inch height measurement will be taken from the bottom of the spare tire well.
• Walls are not allowed in Stock Pro Division.
PORTS
• All port styles and designs are allowed in Stock Pro Division.
• ABS or PVC plumbing pipe, flared ports or any similar non standard porting is allowed.
WIRING/CONNECTIONS/FUSING
• There is no limit to the size and amount of power and ground wiring allowed in Stock Pro Division.
• IASCA recommends that all wiring for electronics be fused at the power source.
ELECTRICAL SYSTEM
• Maximum allowed voltage (vehicle running or off) is 15.5 volts.
• The vehicle’s OEM factory style alternator can be upgraded from its original OEM factory output only. Larger alternators in
physical size and/or shape are not allowed.
• Additional alternators are not allowed.
• If used, the upgraded alternator must be mounted in the factory OEM location of the original factory OEM alternator.
• Vehicle electrical wiring (starter/alternator/body ground) may be upgraded to the maximum allowable size of wire in
Stock Pro Division.
• Outboard adjustable voltage regulators on alternators are allowed, however the controls for the voltage regulator must be
mounted in an accessible location while operating the system, for safety reasons.
BATTERIES
• Three (3) batteries total are allowed in Stock Pro Division. This includes the vehicle’s main battery.
• Batteries must be standard 12 volt batteries; variations of individual or multiple battery cells equaling 12 volts are not
allowed (e.g. two 6 volt batteries connected in series or six two volt batteries connected the same way). Each individual
battery will be counted as an individual battery, no matter what the voltage.
• One battery must be mounted in the factory OEM battery location.
• The batteries may be upgraded.
• Both batteries must be no larger than 1,200 cubic inches of volume each. To calculate battery volume, multiply the length,
width and height (in inches) together (L x W x H= Total battery volume in cubic inches) to determine volume.
STOCK PRO DIVISION - EQIUPMENT CRITERIA (cont.)
IdBL - 19
• Batteries must be commercially available through standard retail channels (auto supply store, battery supplier, etc.)
• Both batteries must be connected to the vehicle’s 12 volt charging system and properly fused, and cannot operate
independently from the vehicle’s factory OEM charging system.
• Any and all batteries in the vehicle, whether connected to the vehicle or vehicle’s charging system or not, will be counted as
part of the system and the vehicle will be classified as having that amount of batteries.
• The additional battery/ies must be mounted and securely fastened in the OEM cargo area of the vehicle; batteries are not
allowed in the passenger area (interior) of the vehicle, whether connected or not, during testing.
• Non sealed, automotive style batteries mounted in the OEM cargo area must be enclosed and vented to the outside of the
vehicle.
SOUND DEADENING
• Sound deadening (or dampening) materials may be used behind or inside any factory OEM panels, so long as the factory
panel remains intact, unaltered and in its original factory OEM location.
SAFETY EQUIPMENT
If a competitor chooses not to abide by the IASCA Worldwide Inc. recommendation to fuse all electronics at the source of
power, whereas serious damage or injury to products, vehicles and/or people is possible, it is advised to keep an “A-B-C”
rated fire extinguisher at the ready. Consult your local fire department for more information about fire extinguishers.
The intent of the Advanced No Wall Division is to provide a competition arena for competitors whose vehicles are modified
beyond the criteria of the Stock Pro Division. As the Division name states, walls are not allowed; however, competitors are not
restricted to the OEM cargo area of their vehicle when positioning their subwoofer enclosure/s and/or equipment. This Division
is designed to provide a balance between the Stock Pro and Advanced Divisions.
• Advanced No Wall Division competitors can be associated and/or work within the mobile electronics industry or any of its
affiliates.
• Advanced No Wall Division competitors may receive compensation or support in the form of sponsorships from any facet
of the mobile electronics industry or its affiliates, even though they may not work directly in the industry.
• Competitors operating their sound system from inside the vehicle while competing must operate the system from the
standard driver’s seat seating position. Competitors must be seated as if they were driving; no other seating position is
acceptable.
• Competitors are allowed to have up to six (6) “co-pilots” assisting them while competing in the competition lanes. If the copilots
are assisting by holding down panels on the vehicle, the co-pilots must have both feet on the ground at all times
during testing. Co-pilots are not allowed to jump up on the trunk, hood or roof of the vehicle while it is being tested.
• Competitors must completely fill out and sign their Official IdBL score sheet. Failure to do so will result in the loss of any
accrued IASCA CAP points from the event, no exceptions.
1. All vehicles in the IdBL Advanced No Wall Division must remain OEM stock forward of the vehicle’s “B: pillar. External
and internal aftermarket add-ons such as body kits, wings, wheels, aftermarket seats, steering wheels or any automotive
related cosmetic and performance items not related to the vehicle’s 12 volt electrical system are allowed.
2. Vehicles competing in the Advanced No Wall Division may be driven , towed or trailered to the event. The vehicle must
still be able to enter and exit the competition lanes under their own power.
3. All OEM panels and components in the vehicle, from the “B” pillar forward, must remain in their factory mounted location.
Exception: panels that are designed to be removable, such as the parcel shelf panel in some hatchbacks, can be removed.
Seats may also be removed in Stock Pro. The general rule of thumb is if the vehicle manufacturer designed the item to be
removable, it can be removed; if the item is designed to be fixed in place, it may not be removed. Any issues regarding the
intent of the manufacturer with an item will be decided by event officials and their decision will be final.
4. All OEM factory windows forward of the vehicle’s “B” pillar, designed by the manufacturer to be operational, must be able
to function as the manufacturer intended them to and nothing can impede their proper operation. OEM glass may not be
replaced with any substitute transparent material.
5. No panels or sheet metal in the vehicle forward of the “B” pillar can be modified so as to increase the SPL level of the
vehicle. All sheet metal, steel, plastic, wood and any other materials, forward of the “B” pillar, used by the manufacturer to
IdBL ADVANCED NO WALL DIVISION
ADVANCED NO WALL DIVISION - COMPETITOR CRITERIA
STOCK PRO DIVISION - EQIUPMENT CRITERIA (cont.)
ADVANCED NO WALL DIVISION - VEHICLE CRITERIA
IdBL - 20
build the vehicle must remain intact and unaltered, with the following exceptions; door panel build outs and kick pods
built to house operational speakers the purpose of increasing sound quality only, panel modifications for cosmetic purposes
only and/or cut throughs in pick up trucks will be allowed. Speaker build outs forward of the vehicle’s “B” pillar, designed
for the purpose of increasing SPL, will not be allowed. It is at the discretion of IASCA and/or the IASCA event official/s to
determine the intent of the build outs/modifications; their decision will be final.
6. Competitors are not allowed to have any panels, covers or tinting blocking the view to the inside of the vehicle during
testing. Window tinting is acceptable, so long as it does not impede the judge’s view of the interior and any component of
the measuring equipment during testing. If any panel, covering or tinting is deemed to block the view of the measuring
equipment and/or is deemed unacceptable by an IASCA Certified Judge during an event, the competitor will be asked to
remove the item/s so as to not impede the view to the interior of the vehicle. Refusal to do so may result in disqualification
from the event.
7. All OEM factory seals and gaskets must be in place on all functional panels (including but not limited to; doors, trunk,
hatches, glass, etc.).
8. All equipment in Advanced No Wall Division must be mounted behind the vehicle’s “B” pillar, with the exception of the
source unit and speakers installed for the purposes of increasing sound quality.
9. Regular cab, extended (king) cab and crew cab trucks are allowed to compete in Advanced No Wall Division, even with a
“cut through” from the bed to the cab. If the truck has a cut through, the enclosure cannot protrude forward of the vehicle’s
“B” pillar. The 25 inch height rule still applies for cut throughs. If the truck does not have a cut through, competitors must
adhere to the following guidelines; REGULAR CAB TRUCKS (Compact and Full Size) - The subwoofer enclosure must
be mounted to the rear wall of the cab and no taller than 25 inches in height (see equipment criteria for Stock Pro Division)
from the cab floor. The enclosure cannot impede the full operation of the seat and seat travel must remain intact.
EXTENDED (KING) AND CREW CAB TRUCKS (Compact and Full Size) - The subwoofer enclosure can be mounted
in the rear “seat” or rear passenger area of the vehicle, but the enclosure cannot protrude forward of the vehicle’s “B” pillar.
Additionally, the enclosure must be mounted to the rear wall of the cab and no taller than 25 inches in height from the cab
floor. The enclosure cannot impede the full operation of the front seat and front seat travel must remain intact.
10. The vehicle must have the factory OEM dashboard in place, intact and unmodified from its original design, with the
exception of cosmetic upgrades. All accessories/gauges/switches in the dashboard must remain functional. The only
additions allowed to an OEM dashboard are speakers for improving sound quality only.
11. Aftermarket and/or custom center consoles are allowed in Advanced No Wall Division competition, but said console/s must
be securely mounted and functional. “Functional” means that the console must provide storage for accessories and/or house
functional electronic equipment. If in the opinion of the IASCA official, the console is designed for the purpose of
increasing SPL, they may reclassify the competitor to a higher Division. Any aftermarket or custom console installed in an
Advanced No Wall Division vehicle cannot extend in height past the bottom of the steering wheel. In the case of vehicles
equipped with tilt steering, the steering wheel will be positioned perpendicular to the steering column to take the
measurement.
12. No additional brackets or holders may be attached to the vehicle in any way, or anywhere, on the vehicle, for the purpose of
housing additional equipment of any type. The complete vehicle (exterior and interior) must maintain an OEM factory
look.
14. Nothing in the vehicle may interfere with the correct placement of the measuring device and its placement jig.
15. Any modification to a vehicle that is not covered in this section will be considered illegal in Advanced No Wall Division
competition and must be approved by the IASCA Head Office before being allowed in competition.
16. All OEM panels and components, including dashboards, forward of the “B” pillar in the vehicle must remain stock and in
their factory mounted location, with the exception of the front seats which may be removed for testing then replaced (only
while in the competition lanes). From the “B” pillar back to the rear of the vehicle, any modifications can be made. Rear
seating is not required. Front seats do not have to be OEM; a substitute seat may be used for ease of removal and
reinstallation.
17. Vehicles that are not allowed to compete in Advanced No Wall Division include, but are not limited to; limousines,
conversion vans, ambulances, buses, delivery trucks and/or cube vans, motorhomes, armored cars and/or any other vehicle
that has been built or modified by someone other than an automobile manufacturer. If there is a question as to the legality of
a vehicle in Advanced No Wall Division competition, the decision will fall to the IASCA Head Office and that decision will
be final. If a vehicle in question attends an event to participate, the event officials are instructed to allow the vehicle to
compete and after the event, send the information to the IASCA Head Office to be reviewed for the decision. If the vehicle
is found to be illegal for competition in the Advanced No Wall Division, it will be reclassified and the competitor, officials
and event host will be notified immediately. Vehicle and competitor positioning and CAP points will be adjusted for that
event.
ADVANCED NO WALL DIVISION - VEHICLE CRITERIA (cont.)
IdBL - 21
All equipment used in the Advanced No Wall Division must be commercially available through standard retail channels
(retailer, box store, etc.). Equipment used may be modified, but must still maintain its factory original “look”.
SOFTWARE
• Competitors may use any approved commercially available media. IASCA considers CD as its main media format for
use in competition; alternate media (such as MP3) may also be used in competition if the event host offers it. For a detailed
explanation on what is considered “Alternate Media”, go to page SQ-4 “Software Use in IASCA Competition” in the rule
book.
SOURCE UNITS
• CD source (head) units, iPods, MP3 & Zune players, DAT, mini disc, hard drives, etc. are acceptable for IdBL Advanced
No Wall Division competition. Formats other than CD may not be available at all events.
• The source unit used to operate the system may be mounted in the factory OEM location or on an external podium .
AMPLIFIERS
• There is no limit to the amount of amplifiers that can be used in Advanced No Wall Division.
• Amplifiers must be safely and securely mounted in the vehicle.
SUBWOOFERS/SPEAKERS
• All types of subwoofers are allowed in Advanced No Wall Division competition, as long as they fit all other criteria
specified for equipment.
• Subwoofers must be mounted safely and securely in the vehicle and/or subwoofer enclosure (sub box).
PROCESSORS
• All types of processors/line drivers/crossovers/equalizers are allowed in IdBL competition, so long as they fit all criteria for
competition and are powered by the vehicle’s 12 volt charging system.
CAPACITORS
• There is no limit to the amount of capacitors allowed in Advanced No Wall Division.
• All capacitors must be safely and securely mounted in the vehicle.
SOUND DEADENING
• Sound deadening (or dampening) materials may be used behind or inside any factory interior OEM panels forward of the
vehicle’s “B” pillar, so long as the factory panel remains intact, unaltered and in its original factory OEM location.
SUBWOOFER ENCLOSURE/S
• Subwoofer enclosures (or Sub boxes) can be either pre-fabricated (store bought) or custom made enclosures.
• Subwoofer enclosures must be safely and securely mounted behind the leading edge of the vehicle’s “B” pillar.
• The subwoofer enclosure cannot exceed 25 inches in height from the OEM floor of the cargo area to the top of the
enclosure. This includes any “supports” or “legs” that prop up the enclosure and any components attached to the
enclosure (amplifiers, subwoofer/basket/surround, power distribution block, etc.). If any part of the enclosure utilizes the
spare tire well area of the cargo area, the 25 inch height measurement will be taken from the bottom of the spare tire well.
• Walls are not allowed.
PORTS
• All port styles and designs are allowed in Advanced No Wall Division.
• ABS or PVC plumbing pipe, flared ports or any similar non standard porting is allowed.
WIRING/CONNECTIONS/FUSING
• There is no limit to the size and amount of power and ground wiring allowed.
• IASCA recommends that all wiring for electronics be fused at the power source.
ELECTRICAL SYSTEM
• Maximum allowed voltage (vehicle running or off) is 18.0 volts.
• The vehicle’s OEM factory style alternator can be upgraded. Larger alternators in physical size and/or shape are allowed.
• One additional alternator is allowed.
• One alternator must remain in the factory OEM location.
• Vehicle electrical wiring (starter/alternator/body ground) may be upgraded.
• Outboard adjustable voltage regulators for alternators are allowed, however the controls for the voltage regulator must be
mounted in an easily accessible location while operating the system, for safety reasons.
BATTERIES
• There is no limit to the amount of batteries allowed.
• Batteries can be of any size, style or shape. Modified battery “banks” are allowed, but the total voltage cannot exceed 18.0
volts, with the vehicle running or not.
• One battery must be mounted in the factory OEM battery location.
• The batteries may be upgraded.
ADVANCED NO WALL DIVISION - EQUIPMENT CRITERIA
IdBL - 22
• Batteries must be commercially available through standard retail channels (auto supply store, battery supplier, etc.)
• One battery minimum must be connected to the vehicle’s 12 volt charging system and cannot operate independently from
the vehicle’s factory OEM charging system.
• Additional battery/ies must be mounted and securely fastened in the OEM cargo area of the vehicle; batteries are not
allowed in the passenger area (interior) of the vehicle, whether connected or not, during testing.
• Non sealed, automotive style batteries mounted in the OEM cargo area must be enclosed and vented to the outside of the
vehicle.
SAFETY EQUIPMENT
If a competitor chooses not to abide by the IASCA Worldwide Inc. recommendation to fuse all electronics at the source of
power, whereas serious damage or injury to products, vehicles and/or people is possible, it is advised to keep an “A-B-C”
rated fire extinguisher at the ready. Consult your local fire department for more information about fire extinguishers.
The intent of the Advanced Division is to provide a progression from the lower Divisions as competitors upgrade their
equipment in the vehicle and/or modify the vehicle beyond the criteria set forth in the Rookie, Stock and Stock Pro
Divisions.
Like the Stock Pro and Advanced No Wall Divisions, it also provides a format where pros and consumers can compete against
each other.
• Advanced Division competitors can be associated and/or work within the mobile electronics industry or any of its affiliates.
• Advanced Division competitors may receive compensation or support in the form of sponsorships from any facet of the
mobile electronics industry or its affiliates, even though they may not work directly in the industry.
• Competitors operating their sound system from inside the vehicle while competing must operate the system from the
standard driver’s seat seating position. Competitors must be seated as if they were driving; no other seating position is
acceptable.
• Competitors are allowed to have up to six (6) “co-pilots” assisting them while competing in the competition lanes. If the copilots
are assisting by holding down panels on the vehicle, the co-pilots must have both feet on the ground at all times
during testing. Co-pilots are not allowed to jump up on the trunk, hood or roof of the vehicle while it is being tested.
• Competitors must completely fill out and sign their Official IdBL score sheet. Failure to do so will result in the loss of any
accrued IASCA CAP points from the event, no exceptions.
1. All vehicles in the IdBL Advanced Division must remain OEM stock, forward of the vehicle’s “B” pillar. External and
internal aftermarket add-ons such as body kits, wings, wheels, aftermarket seats, steering wheels or any automotive related
cosmetic and performance items are allowed.
2. Vehicles competing in Advanced Division may be driven to the event, towed or trailered. Vehicle must still be able to enter
and exit the competition lanes under their own power.
3. All OEM panels and components, including dashboards, forward of the “B” pillar in the vehicle must remain stock and in
their factory mounted location, with the exception of the front seats which may be removed for testing. From the “B” pillar
back to the rear of the vehicle, any modifications can be made. Rear seating is not required.
4. All OEM factory windows in the vehicle, from the “B” pillar forward, designed by the manufacturer to be
operational, must be able to function as the manufacturer intended them to and nothing can impede their proper operation.
Factory OEM glass forward of the “B” pillar may not be replaced with any transparent substitute material.
5. No panels or sheet metal in the vehicle, forward of the “B” pillar, can be modified so as to increase the SPL level of the
vehicle. All sheet metal, steel, plastic, wood and any other materials, forward of the “B” pillar, used by the manufacturer
to build the vehicle must remain intact and unaltered, with the following exceptions; door panel build outs and kick pods
built to house operational speakers for the purpose of increasing sound quality only and, panel modifications for cosmetic
purposes only. Speaker door panel build outs designed for the purpose of increasing SPL will not be allowed. It is at the
discretion of IASCA and/or the IASCA event official/s to determine the intent of the build outs/modifications; their decision
will be final.
6. Competitors are not allowed to have any panels, covers or tinting blocking the view to the inside of the vehicle during
testing. Window tinting is acceptable, so long as it does not impede the judge’s view of the interior and any component of
the measuring equipment during testing. If any panel, covering or tinting is deemed to block the view of the measuring
IdBL ADVANCED DIVISION
ADVANCED DIVISION - COMPETITOR CRITERIA
ADVANCED NO WALL DIVISION - EQUIPMENT CRITERIA
ADVANCED DIVISION - VEHICLE CRITERIA
IdBL - 23
equipment and/or is unacceptable by an IASCA Certified Judge during an event, the competitor will be asked to remove
the item/s so as to not impede the view to the interior of the vehicle. Refusal to do so may result in disqualification from the
event.
7. All OEM factory seals and gaskets must be in place on all functional panels (including but not limited to; doors, trunk,
hatches, glass, etc.). For older vehicles where the OEM factory replacements may not be available, an aftermarket
equivalent may be used in its place. If an aftermarket equivalent is used, competitors must notify the IASCA Officials at the
event as to its use. The IASCA Officials will inspect the equivalent to determine if it is used for that purpose, or for the
purpose of increasing SPL.
8. The vehicle must have the OEM factory dashboard in place, intact unmodified from its original design, with the exception
of cosmetic upgrades. All accessories/gauges/switches in the dashboard must remain functional. The only additions
allowed to an OEM dashboard are speakers for improving sound quality only.
9. Aftermarket and/or custom center consoles are allowed in IdBL Advanced Division competition, but said consoles must
be securely mounted and functional. “Functional” means that the console must provide storage for accessories and/or house
functional electronic equipment. If, in the opinion of the IASCA event official, the console is designed solely for the
purpose of increasing SPL, they may reclassify the competitor to the Ultimate Division. Any aftermarket or custom
console installed in an Advanced Division vehicle cannot extend past the bottom of the steering wheel. In the case of
vehicles with tilt steering, the steering wheel will be positioned perpendicular to the steering column to take the
measurement.
10. No additional brackets or holders may be attached to the outside of the vehicle, or to any interior area forward of the
vehicle’s “B” pillar for the purpose of housing additional equipment of any type. The vehicle must maintain an OEM
factory look on the complete outside and in the interior forward of the vehicle’s “B” pillar.
11. Roof build downs and floor build ups, forward of the vehicle’s “B” pillar, are not allowed in Advanced Division
competition.
12. Front seats that are removed for testing may only be removed once the vehicle is stationary (staged) in the competition lane
and not before. They must be in place and mounted securely when the vehicle is being driven into and out of the
competition lane.
13. Any modification to a vehicle that is not covered in this section will be considered illegal in Advanced Division competition
and must be approved by the IASCA Head Office before being allowed in competition.
14. All external body panels (upper, sides, front and rear) in an Advanced Division vehicle must remain intact and unaltered
from their factory OEM specs, with the exception of the addition of aftermarket body “kits” for cosmetic upgrade purposes
only. Competitors may make modifications to the lower (floor) panel of the vehicle behind the leading edge of the
vehicle’s “B” pillar.
15. Nothing may interfere with the correct placement of the measuring device or its placement jig.
16. Structural bracing may be installed in an Advanced Division vehicle behind the trailing edge of the vehicle’s “B” pillar
only. Bracing may only be installed inside the vehicle, not on the exterior.
All equipment used in the Advanced Division must be commercially available through standard retail channels (retailer,
box store, etc.). Equipment used may be modified, but must still maintain its factory original “look”.
SOFTWARE
• Competitors may use any approved commercially available media. IASCA considers CD as its main media format for
use in competition; alternate media (such as MP3) may also be used in competition if the event host offers it. For a detailed
explanation on what is considered “Alternate Media”, go to page SQ-4 “Software Use in IASCA Competition” in the rule
book.
SOURCE UNITS
• CD source (head) units, iPods, MP3 & Zune players, DAT, mini disc, hard drives, etc. are acceptable for IdBL Advanced
Division competition. Formats other than CD may not be available at all events.
• The source unit may be mounted in the factory OEM location or on an external podium to operate the system.
AMPLIFIERS
• Competitors in Advanced Division are not limited to the amount of amplifiers they may use.
• Amplifiers must be safely and securely mounted in the vehicle and/or on the podium.
SUBWOOFERS/SPEAKERS
• All types of subwoofers are allowed in Advanced Division competition, as long as they fit all other criteria specified for
equipment.
• Subwoofers must be mounted safely and securely in the vehicle and/or subwoofer enclosure (sub box).
ADVANCED DIVISION - VEHICLE CRITERIA (cont.)
ADVANCED DIVISION - EQUIPMENT CRITERIA
IdBL - 24
• All subwoofers must be mounted behind the leading edge of the vehicle’s “B” pillar in Advanced Division. Speakers and/
or subwoofers mounted in the interior of the vehicle, forward of the “B” pillar, installed with the intent of increasing SPL
levels below 100 Hz, are not allowed.
PROCESSORS
• All types of processors/line drivers/crossovers/equalizers are allowed in IdBL competition, so long as they fit all criteria for
competition and are powered by the vehicle’s 12 volt charging system.
• All processors/crossovers/equalizers must be safely and securely mounted in the vehicle and/or on the podium.
CAPACITORS
• An unlimited amount of capacitance is allowed in Advanced Division.
• Competitors may use a single capacitor or a multiple of capacitors.
• All capacitors must be safely and securely mounted in the vehicle.
SOUND DEADENING
• Sound deadening (or dampening) materials only may be used behind or inside any factory OEM panels forward of the
“B” pillar, so long as the factory panel remains intact, unaltered and in its original factory OEM location.
• Sound deadening materials may be used anywhere on any panels behind the vehicle’s “B” pillar.
SUBWOOFER ENCLOSURE/S
• Walls are allowed in Advanced Division.
• Subwoofer enclosures (or Sub boxes) can be either pre-fabricated (store bought) or custom made enclosures.
• Subwoofer enclosures must be safely and securely mounted behind the leading edge of the vehicle’s “B” pillar.
PORTS
• All port styles and designs are allowed in Advanced Division.
• ABS or PVC plumbing pipe, flared ports or any similar non standard porting is allowed.
WIRING/CONNECTIONS/FUSING
• There is no limit to the amount and/or size of power and/or ground wiring allowed in Advanced Division.
• IASCA recommends that all wiring for electronics be fused at the power source.
ELECTRICAL SYSTEM
• Maximum allowed voltage (vehicle running or off) is 18.0 volts.
• The vehicle’s OEM factory style alternator can be upgraded. Larger alternators in physical size and/or shape are allowed.
• Advanced Division competitors are allowed to add one additional alternator.
• If an additional alternator is used, that alternator must be mounted within the limitations of the OEM factory engine
compartment of the vehicle. Competitors are not allowed to create an opening in any external body panel of the vehicle in
order to accommodate the additional alternator.
• Vehicle electrical wiring (starter/alternator/body ground) may be upgraded.
• Outboard adjustable voltage regulators for alternators are allowed, however the controls for the voltage regulator must be
mounted in an easily accessible location while operating the system, for safety reasons.
BATTERIES
• There is no limit to the amount of batteries allowed in Advanced Division.
• Batteries can be of any size, style or shape. Modified battery “banks” are allowed, but the total voltage cannot exceed 18.0
volts, with the vehicle running or not.
• One battery must be mounted in the factory OEM battery location.
• Batteries must be commercially available through standard retail channels (auto supply store, battery supplier, etc.)
• Additional battery/ies must be mounted and securely fastened in the OEM cargo area of the vehicle; batteries are not
allowed in the passenger area (interior) of the vehicle, whether connected or not, during testing.
SAFETY EQUIPMENT
If a competitor chooses not to abide by the IASCA Worldwide Inc. recommendation to fuse all electronics at the source of
power, whereas serious damage or injury to products, vehicles and/or people is possible, it is advised to keep an “A-B-C”
rated fire extinguisher at the ready. Consult your local fire department for more information about fire extinguishers.
ADVANCED DIVISION - EQUIPMENT CRITERIA (cont.)
IdBL -

The IdBL Ultimate Division is designed to showcase the limits a vehicle can be taken to in order to achieve the highest possible
SPL levels. Competitors in Ultimate Division are typically seasoned SPL competitors with a great knowledge of the science
of SPL competition.
Being virtually a “no holds barred” competition Division, competitors are urged to “push the envelope” in the design and
performance of their SPL vehicles.
• Ultimate Division competitors can be associated and/or work within the mobile electronics industry or any of its affiliates.
• Ultimate Division competitors may receive compensation or support in the form of sponsorships from any facet of the
mobile electronics industry or its affiliates, even though they may not work directly in the industry.
• Competitors in Ultimate Division must operate their sound system from outside their vehicle, no exceptions. No one is
allowed to be inside an Ultimate vehicle during testing.
• Competitors are allowed to have up to six (6) “co-pilots” assisting them while competing in the competition lanes. If the copilots
are assisting by holding down panels on the vehicle, the co-pilots must have both feet on the ground at all times
during testing. Co-pilots are not allowed to jump up on the trunk, hood or roof of the vehicle while it is being tested.
• Competitors must completely fill out and sign their Official IdBL score sheet. Failure to do so will result in the loss of any
accrued IASCA CAP points from the event, no exceptions.
1. All vehicles in the IdBL Ultimate Division can be modified anywhere in the interior of the vehicle.
2. Vehicles competing in Ultimate Division may be driven to the event, towed or trailered. Vehicles must still be able to enter
and exit the competition lanes under their own power.
3. All OEM factory windows forward of the vehicle’s “B” pillar may be replaced with any transparent substitute material. The
transparent material used to replace the factory OEM glass must maintain a minimum of 720 square inches of visibility in
the windshield area , and a minimum of 140 square inches of visibility in each door glass area. The replacement material
must closely approximate the same rake and angle of the original OEM glass in the vehicle. All glass panels rearward of the
vehicle’s “B” pillar can be replaced with any transparent or non transparent material. The area of the windshield where the
measuring device is mounted must be clear and allow viewing of the measuring device from the outside.
4. Competitors are not allowed to have any panels, covers or tinting blocking the view to the inside of the vehicle during
testing. Window tinting is acceptable, so long as it does not impede the judge’s view of the interior and any component of
the measuring equipment during testing. If any panel, covering or tinting is deemed to block the view of the measuring
equipment and/or is unacceptable by an IASCA Certified Judge during an event, the competitor will be asked to remove
the item/s so as to not impede the view to the interior of the vehicle. Refusal to do so may result in disqualification from the
event.
5. Any additional framing and/or bracing used in an Ultimate Division vehicle, to support or strengthen any panel or
replacement transparent material (window framing), must not interfere with the proper positioning of the measuring device
or its placement jig.
6. Ultimate Division competitors must provide an opening through the vehicle’s body or glass, a minimum of 1.125 inches
in diameter, that can be properly sealed during testing, in order to pass the measuring device cable through. Grooves or
gaps between a vehicle’s door and door frame are not acceptable openings. The opening must have some type of seal or
gasket to protect the measuring device cable from being cut and/or pinched, and to eliminate any chance of venting to the
outside of the vehicle through the opening during testing. The measuring device cable must not pass through any electrical
connections in or on the vehicle. Exception: Vehicles that have been reclassified to the Ultimate Division may be exempt
from this rule, dependent upon the door frame and glass design of the vehicle.
7. Ultimate Division vehicles cannot have any partition and/or wall above the height of the dashboard, anywhere in the interior
of the vehicle, that separates the driver and passenger compartments.
8. Subwoofers, enclosures (sub boxes), vents, ports or walls must be located behind the vehicle’s “B” pillar. Exception: In
the case of Ultimate Division vehicles that have a wall, it may pass forward of the “B” pillar of the vehicle, so long as it
allows for seating (fetal position is acceptable) of two average sized adults (5’9”, 180 lbs.) and maintains a distance of 24
inches from the measuring device. This distance is measured from the point on the wall that protrudes the furthest
(including speakers, surrounds, supports and braces).
9. Floorboards in an Ultimate Division vehicle may be raised above the OEM factory door jamb.
10. Roof interiors in an Ultimate Division vehicle may be lowered below the OEM factory door frame. Any “extensions” of the
lowered roof fall within the guidelines set out for visibility into the interior of the vehicle; if a lowered roof line protrudes
IdBL ULTIMATE DIVISION
ULTIMATE DIVISION - COMPETITOR CRITERIA
ULTIMATE DIVISION - VEHICLE CRITERIA
IdBL - 26
into the windshield or door glass area, it is considered in the calculation of total visibility to the interior of the vehicle (see
Vehicle Criteria, rule #3, p. IdBL-51).
11. OEM factory door framing can be altered from the original OEM factory specifications for the purpose of strengthening the
door frame and creating mounting points to attach the door.
12. All openings to the interior of the vehicle must have some form of gasket or seal to eliminate any chance of venting to the
outside of the vehicle during testing.
13. Vehicle door panel build outs are allowed in Ultimate Division competition. Competitors may use additional latching
mechanisms to secure doors during testing (straps, bolts, etc.).
14. Ultimate Division competitors may add a custom built dashboard in their vehicle. The dashboard height cannot extend any
higher than the top of the original OEM dashboard, or 3 inches above the base of the OEM windshield frame. “Base”
in this reference means the part of the windshield frame that attaches to the firewall of the vehicle through the width of the
vehicle at the joining point.) It may run the complete width of the vehicle and extend inward to the interior of the vehicle,
but it cannot exceed the height limitation set forth in this rule.
15. Ultimate Division competitors may add a custom center console in their vehicles. The console cannot extend past the top of
the dashboard; it may vary in length and width, but it cannot exceed the height limitation set out in this rule.
16. All interior modifications must still allow two average sized adults (see rule #8) to sit comfortably in the interior of the
vehicle (one on the driver’s side and one on the passenger’s side). Other than a standard seating position, like in a regular
seat in a vehicle, the only other acceptable seating position is the fetal position. To be considered as “comfortable”,
officials sitting in the fetal position to test compliance with this rule must have a minimum of 12 inches between their
knees and chin. Officials must be able to hold their head straight up while sitting in the fetal position on the vehicle floor
during this test. This means that there must be an approximate distance of 30 inches (the average height of the torso,
neck and head of an average sized adult) between the highest point of the vehicle’s floor and lowest point of the vehicle’s
roof.
17. For purposes of clarification, an “average sized adult” is considered as a 5 foot, 9 inch tall (176 centimeters) person
weighing 180 pounds (67 kilograms).
18. Vehicles in the Ultimate Division can be modified to increase or decrease the length, width and/or height of the vehicle,
deviating from the intent of the OEM factory body specifications of the vehicle, for the purposes of increasing SPL, so long
as the vehicle meets all other criteria set forth and rules set forth for the Ultimate Division. This will include, but not limited
to; stretching, widening, heightening, storage compartments on the roof, floor cut outs, non factory or aftermarket body
panels, etc. All modifications to any Ultimate Division vehicle must still attempt to maintain an OEM factory “look”.
19. All types of vehicles are allowed to compete in Ultimate Division.
All equipment used in the Ultimate Division must be commercially available through standard retail channels
(retailer, box store, etc.). Equipment used may be modified, but must still maintain its factory original “look”.
SOFTWARE
• Competitors may use any approved commercially available media. IASCA considers CD as its main media format for
use in competition; alternate media (such as MP3) may also be used in competition if the event host offers it. For a detailed
explanation on what is considered “Alternate Media”, go to page SQ-4 “Software Use in IASCA Competition” in the rule
book.
SOURCE UNITS
• CD source (head) units, iPods, MP3 & Zune players, DAT, mini disc, hard drives, etc. are acceptable for IdBL Advanced
Division competition. Formats other than CD may not be available at all events.
• The source unit must be mounted on an external podium or similar device to operate the system.
AMPLIFIERS
• Competitors in Ultimate Division are not limited to the amount of amplifiers they may use.
• Amplifiers must be safely and securely mounted in the vehicle and/or on the podium.
SUBWOOFERS/SPEAKERS
• All types of subwoofers are allowed in Ultimate Division competition, as long as they fit all other criteria specified for
equipment.
• Subwoofers must be mounted safely and securely in the vehicle and/or subwoofer enclosure (sub box).
• All subwoofers must be mounted no closer than 25 inches from the standard IdBL measuring device position in the
vehicle in Ultimate Division. Speakers and/or subwoofers mounted in the vehicle, 25 inches or closer to the measuring
device position for the purposes of generating SPL, will not be allowed to compete in IdBL competition.
ULTIMATE DIVISION - VEHICLE CRITERIA (cont.)
ULTIMATE DIVISION - EQUIPMENT CRITERIA
IdBL - 27
PROCESSORS
• All types of processors/line drivers/crossovers/equalizers are allowed in IdBL competition, so long as they fit all criteria for
competition and are powered by the vehicle’s charging system.
• All processors/crossovers/equalizers must be safely and securely mounted in the vehicle and/or on the podium.
CAPACITORS
• An unlimited amount of capacitance is allowed in Ultimate Division.
• Competitors may use a single capacitor or a multiple of capacitors.
• All capacitors must be safely and securely mounted in the vehicle.
SOUND DEADENING
• Sound deadening (or dampening), expanding foam or any other form of deadening material may be used anywhere in the
interior of an Ultimate Division vehicle.
BRACING
• Structural bracing may be used anywhere in the vehicle to strengthen any panel/s. Bracing that is used to hold down panels
(Examples: a brace that extends from the roof to the floor or a brace that runs from the windshield towards the rear of the
vehicle) to eliminate the flexing of those panels cannot exceed three (3) inches in thickness (if round) or 7 square inches in
two dimensions (height, width or length). The bracing cannot block the judges view from one side of the vehicle to the
other if the brace is positioned forward of the “B” pillar in the vehicle. Competitors are limited to two such braces forward
of the “B” pillar in the vehicle.
SUBWOOFER ENCLOSURE/S
• Walls are allowed in Ultimate Division.
• Subwoofer enclosures (or Sub boxes) can be either pre-fabricated (store bought) or custom made enclosures.
• Subwoofer enclosures must be safely and securely mounted in the vehicle, no closer than 25 inches to the standard IdBL
positioning of the measuring device. Subwoofer enclosures and equipment can protrude forward of the “B” pillar in
Ultimate Division, so long as they meet with the 25 inch rule stated above.
• Subwoofer enclosures can have a seal or gasket creating a seal between the enclosure and body panels of the vehicle
(e.g. fiberglass cover around opening between interior and cargo area, sealing off the interior).
PORTS
• All port styles and designs are allowed in Ultimate Division.
• ABS or PVC plumbing pipe, flared ports or any similar non standard porting is allowed.
WIRING/CONNECTIONS/FUSING
• There is no limit to the amount and/or size of power wiring allowed in Ultimate Division.
• IASCA recommends that all wiring for electronics be fused at the power source.
ELECTRICAL SYSTEM
• Maximum allowed voltage (vehicle running or off) is 18.0 volts.
• The vehicle’s OEM factory style alternator can be upgraded. Larger alternators in physical size and/or shape are allowed.
• There is no limit to the number of alternators a competitor can use in Ultimate Division..
• If an additional alternators are used, there is no limit to the external modifications to the vehicle to make them “fit”.
However, modifications are allowed forward of the windshield only.
• Vehicle electrical wiring (starter/alternator/body ground) may be upgraded.
• Outboard adjustable voltage regulators for alternators are allowed, however the controls for the voltage regulator must be
mounted in an easily accessible location while operating the system, for safety reasons.
BATTERIES
• There is no limit to the amount of batteries allowed in Ultimate Division.
• Batteries can be of any size, style or shape. Modified battery “banks” are allowed, but the total voltage cannot exceed 18.0
volts, with the vehicle running or not.
• Batteries must be commercially available through standard retail channels (battery manufacturer, auto supply store, battery
supplier, etc.)
• Additional battery/ies must be mounted and securely fastened in the vehicle; batteries are not allowed in the passenger area
(interior) of the vehicle, whether connected or not, during testing.
SAFETY EQUIPMENT
If a competitor chooses not to abide by the IASCA Worldwide Inc. recommendation to fuse all electronics at the source of
power, whereas serious damage or injury to products, vehicles and/or people is possible, it is advised to keep an “A-B-C”
rated fire extinguisher at the ready. Consult your local fire department for more information about fire extinguishers.

Just thought i post the rules for now.