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2007 IASCA Bass Boxing Finals at Spring Break Nationals featuring Alma Gates Bronco (above)

2 Time Heavyweight Bass Boxing Champion Pipo Sanchez

IASCA Scandinavia Bass Boxing car (above)

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BASS BOXING - FORMAT OVERVIEW

IASCA BASS BOXINGis a type of SPL competition (sound pressure level) using full range music as themain judging criteria. Bass Boxing pits several competitors against each other until one competitor

prevails as Champion. Its a true test of how a system performs in every day applications.

The Qual ifying Rou ndis a 30 second round. Competitors are allowed to use any approved,commercia lly avai lab le m usic. IASCA Judges, using an approved SPL meter, will register the averageSPL score during that timeframe. All competitors compete in the qualifying round and the top twocontenders with the highest average SPL score in each Bass Boxing Division will move on to the finalrounds.

Final Rounds - Rounds 1, 2 and 3pit the top two competitors against each other in an all out, fullrange musical SPL competition. In these rounds, competitors may once again choose any approvedcommercially available music. Each Round has specific criteria; please read the General Bass BoxingRules on the next page for details. These rounds will also last 30 seconds each and the Judges willregister the highest average SPL score during that timeframe.

In all Bass Boxing competition rounds, the fu l l range of m usic (not just bass) mu st be heardcleanlyand clear ly b y everyone, including judges and spectators, so the goal is to build a system that soundsas loud and good outside as it does inside!

If this format of competition sounds like fun to you, youre absolutely right; it is! As a matter of fact, itsfun for everyone because anyone with an amplifier and a subwoofer can compete in one of our severalBass Boxing Divisions. Its also fun for the spectators to see these cars perform, so put on your BASS

BOXING gloves and have a great time with us!

Two time Heavyweight Bass Boxing Champion Pipo Sanchez

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DIVISION Square Inches of Cone Area # of SUBS

CRUISERWEIGHT 1 to 160 sq. in. (No wall class) 3-8s, 2-10s, 1-12

FLYWEIGHT 1 to 240 sq. in (No wall class)3-10s, 2-12s,

1-15

FEATHERWEIGHT 241 to 480 sq. in (No wall class)6-10s, 4-12s,2-15s, 1-18

LIGHTWEIGHT 481to 860 sq. in. (No wall class)10-10s, 7-12s4-15s, 3-18s

WELTERWEIGHT 1 to 480 sq. in. (Wall Class)6-10s, 4-12s,2-15s, 1-18

MIDDLEWEIGHT 481-860 sq. in. (Wall Class)10-10s, 7-12s,4-15s, 3-18s

HEAVYWEIGHT 861+ sq. in. (Wall Class)11+-10s, 8+12s,5+-15s, 4+18s

BASS BOXING DIVISIONS

Woofer Diameter

6.5 8 10 12 15 18

WooferQty. Total Square Inches

1 33.17 50.24 78.50 113.04 176.63 254.34

2 66.33 100.48 157.00 226.08 353.25 508.68

3 99.49 150.72 235.50 339.12 529.87 763.02

4 132.65 200.96 314.00 452.16 706.49 1017.36

5 165.81 251.20 392.50 565.20 883.11 1271.70

6 198.97 301.44 471.00 678.24 1059.73 1526.04

7 232.13 351.68 549.50 791.28 1236.35 1780.38

8 265.29 401.92 628.00 904.32 1412.97 2034.72

9 298.45 452.16 706.50 1017.36 1589.59 2289.06

10 331.61 502.40 785.00 1130.40 1766.21 2543.40

11 364.77 552.64 863.50 1243.44 1942.83 2797.74

12 397.93 602.88 942.00 1356.48 2119.45 3052.08

Round Woofer Conversion Chart(For square woofers, multiply two sides o f the woofer for total square inches)

Bass Boxing Divisions classify competitors by the cumulative amount of square inches of subwoofer cone area and thedegree of modifications to their vehicles. This ensures that competitors are pitted against others fairly. To see which

Bass Boxing Division your system fits into, consult the chart below for the total square inches of your subwoofers andcorrespond it with the Bass Boxing Division Chart.

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Bass B oxing Rules Matr ixThis rules matrix is fo r reference only as a general overview of the rules and wh at is al lowed fo r

each Division .For ful l detai ls, please review the rules for the B ass Boxing Division you co mpete in.

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QUALIFYING ROUND

The QUALIFYING ROUND will determine the top two competitors in each Division; only the toptwo compet i torsin each Division will move on to the final rounds. NOTE: Event hosts have theoption of offering as many qualifying round runs as they want to; some event hosts may only offer oneround due to time constraints.

HOW TO QUALIFY - The competitor has the option of whether they wish to have the vehicles doorsopen or closed during qualifying. The competitor has two minutes from the time they enter thecompetition lane to get ready to compete. The round lasts 30 seconds during which time thecompetitors highest averageSPL score will be recorded. When all qualifying is complete, only the toptwo competitors with the highest average SPL qualifying score will move on to compete against eachother in the Championship Fight.

The CHAMPIONSHIP FIGHT

The Championship Fight consists of three rounds where the top two qualifiers go against each other forthe Title of EVENT CHAMPION. Each Round has certain criteria that must be adhered to; please readcarefully:

ROUND 1 - In Round 1, the competitormus tcompete with the vehicle interior sealed from the outside.However, the crowd must be able to hear fu l l range musicoutside of the vehicle while it is competing.

During Round 1, vehicle openings (such as windows, doors, trunks, hatches or any panel) that whenopened allow speakers to play music to the outside, can be opened as long as the interior compartmentremains sealed from the outside. The use of external speaker pods, or opening panels that houseexternal speaker pods, is also allowed. The competitors highest average SPL score after 30 secondswill be recorded. NOTE:When panels are opened to expose external speaker pods, the system, pod orvehicle cannot allow any ventilation from the interior of the vehicle to outside in Round 1 of competition(closed door round).

ROUND 2 - Round 2 is the same as Round 1, with one exception. In Round 2, the drivers side frontdoor will be opened to 24 inches. A jig will be used to ensure the door is opened to 24 inches. Thecompetitors highest average SPL score after 30 seconds will be recorded. Competitors are not allowedto try opening and closing the door during the competition run, in order to achieve a higher SPL score.

ROUND 3 - Round 3 is again the same as Rounds 1 and 2, with one exception. In Round 3, bo thdriverand passenger front doors will be opened to 24 inches. Competitors may also have any other panelsopened if they choose, but they are not allowed to try opening and closing any of these panels duringthe run in an effort to increase SPL. The competitors highest average SPL score after 30 seconds willbe recorded.

DETERMINING THE CHAMPION (WINNER)

The Champion (winner) will be determined by adding up each competitors scores from Rounds 1, 2 and3 then dividing that total by the number of Rounds to arrive at an average SPL score for all three rounds(Qualifying Round is not included). The competitor with the highest average score for all three roundswill be declared the Champion.

BASS BOXING PROCEDURE

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Whats considered approved, commercially available music?

Commercially available music can mean almost anything, but for the purposes of Bass Boxing rules, itmeans that the music being used in competition must be purchased through standard retail channelsand be available for sale to the general public. The music selected must be approved by the head judgeat the event prior to competing.

NOTE:Any music used in competition cannotcontain any lewd lyrics, foul language or derogatorycomments or acts whatsoever. Music that comes with a Parental Advisory is not allowed in BassBoxing competition. IASCA events are designed to be fun for all ages in a public setting with a positivemessage; any detraction from that goal will not be acceptable.

What is meant by Outside Sound?

Outside sound means that the music mus t be clear ly heard outs ide the vehic le . It does no tmean a

competitor is required to have speakers outside the vehicle.

What is meant by Full range music being heard clearly?

Over the last number of years, the perception of car audio among the general public is these kidsdriving down the street at all hours with boom, boom, boom coming out of their cars.

We know this perception is skewed, because inside the vehicle, passengers are hearing the whole song,not just the bass. The goal here is to show the public that theres more to the music in these vehiclesthan just the boom, boom, boom.

Therefore, in Bass Boxing competition, judges and spectators must be able to hear the whole song

outside the vehicle, not just the bass.The posi t ion ing of fu l l range speakers of any sty le or design

either in, on or o utsid e the vehicle, so that the wh ole song c an be heard by everyo ne, is one of

the most imp ortant ru les.

Think of it this way when competing, youre putting on a concert for the crowd!

Whats the difference between a bass beat and a bass tone?

A bass beat is a bass note that continually repeats itself with a gap between each beat. This iscommon in most of todays music; the beat goes along with the music and is part of the song.

A bass tone is a constant bass note (or frequency) that is being continually played for the duration of asong and does not match the beat of the music; it is just a constant tone playing in the background

and has no bearing on the music being played whatsoever.

In Bass Boxing, music with good bass beats are allowed, but bass tones are

not.

BASS BOXING FAQs

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1. Any rule or item not covered in this rule bookis deemed i l legal for competi t ionand will not beallowed.

2. Competitors mus tplay full range music (see Glossary Of Terms, page 22) and clearly heard outsideof the vehicle. The music may contain a bass beat, but not a continuous bass tone. Music with sine

sweeps, test tones, bass drops, bass bombs, etc. are not allowed. Music CDs with test tones,sweeps, bass drops or bass bombs embedded in the music background (e.g. The IASCA IdBL MaxdB3 CD) maybe allowed if the tone is not constant and the duration of each tone does not exceedone second in length; check with your IASCA Official to see if the music you wish to play will beallowed.

3. At no time can the bass frequencies of the system overpower the mid bass, midrange and highfrequencies, so much so that the vocals and/or others parts of the music cannot be heard clearly bythe judges and spectators. I f th is overpower ing occurs there wi l l be a 2 point deduct ion (perround) from the average score for th at round. Each Bass Boxing Division has minimum speakersize and power requirements refer to the Division rules for details.NOTE: If there is any cause for,concern about, or a disagreement between the IASCA Judges and the competitor, as to whether thefull range of sound (highs, mids, and bass) was clearly heard by everyone, judges will ask the

spectators to vote by a show of hands whether it was clearly heard or not. The spectators vote willdecide if there will be a point deduction or not. This concern can be brought up by the judges,spectators or other competitors.

4. Vehicles mus tbe driven, or pushed manually, into the lanes; they cannot be brought in to the laneson a trailer, or pushed or towed in with another vehicle.

5. Musical selections must be approved by an IASCA Official and must be socially acceptable.Musical tracks rated with Parental Advisories, or musical tracks with lewd or suggestive

lyrics are strictly prohibited.

6. The measuring device will be positioned 4 inches up from the top of the dash and 12 inches inwardfrom the passenger side A pillar. The Judge must be able to see the measuring device (sensor)from outside the vehicle at all times during the competition run; competitors are not allowed to placeany covering (or tinting) on the windshield blocking the Judges ability to see the measuring deviceduring competition. Nothing in the vehicle may interfere with the correct placement of the measuringdevice, its placement jig or the 24 inch door jig.

7. Competitors are prohibited from obstructing the judges view of the measuring device during testing.

8. Competitor shows must also be socially acceptable. Any display that is deemed offensive in natureby the judges will not be allowed and could result in disqualification without recourse. If you areuncertain whether any part of your "show" is appropriate or not, please consult with the Bass Boxingjudges for verification as to its compliance.

9. EQUIPMENT FAILURE- If equipment fails while in the "Bass Boxing ring" pr iorto competition, theywill be allowed 5 (five) minutes to repair the problem. If a breakdown occurs during competition, theaverage score they achieve for that round will be official. However, they will be allowed a 5 minutebreakdown period between rounds to correct the problem. If the problem cannot be corrected in the

5 minute time period, they can run as they are or receive a score of zero for the following round. Ifthe problem cannot be corrected within the allotted time and the competitor cannot compete in thefollowing rounds, it will be considered a TKO and their opponent will win by default.

10. Bass Boxing Finalists must be ready to compete when called upon by the Bass Boxing Officials. If acompetitor fails to appear for the final rounds within five minutes of being called upon, they will besubject to disqualification without recourse, declaring their opponent the Champion by default.Competitors vying for a Bass Boxing World Record may exercise the option to run unopposed inorder to attempt to set a Bass Boxing World Record for their Division.

GENERAL BASS BOXING RULES

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11. Sound systems in Bass Boxing vehicles capable of achieving 150 dB or highermus tbe operatedfrom outside the vehicle during the closed door rounds. During open door rounds, competitors may

operate the vehicle from inside, but mus twear hearing protection.

12. Any and all Bass Boxing competitors operating the vehicle from inside mus twear hearing protectionwhile competing, when sitting inside the vehicle. Competitors who do not wear hearing protectionwhile competing will receive a 1 point deduction per 10 dB step over 100dB for that run. EXAMPLE- a competitor achieves 138 dB and is not wearing hearing protection: 1 point for every 10 dB step:STEP 1 - 100to 110dB ( -1 point), STEP 2 - 110 to 120 dB ( -1 point), STEP 3 120 to 130dB ( -1

point), STEP 4 130 to 140 dB ( -1 point) total 4 point deduction.

13. All Bass Boxing competitors may elect to operate their sound systems from outside the vehicle;however, in the Cruiserweight, Flyweight and Featherweight Divisions, the source unit must remainin its location, cannot be removed and must be operated by remote control or another device. If acompetitor uses an iPod or MP3 type player, it can be operated from outside connected to the headunit via its connection cable.

14. In all rounds (Qualifying or final rounds), the use of any noise making devices (e.g. air horns, trainhorns, etc.) for the purpose of increasing the average SPL for that round is not allowed. In theinstance where a noise making device is used, the competitors score will be disallowed and theywill receive one more chance to register their score. If during the second attempt a noise makingdevice is used again, the competitor will receive a score of zero for that round, no exceptions.

15. A maximum of 2 people (teammembers) per doorare allowed tobe used to partially block or coverthe door opening of the vehicleduring testing. These teammembers mus t stay behind the

door j ig (used to hold door open at

24 inches) and cannot pu sh

against i t, lean ov er i t or shield the

opening in any way dur ing thecom pet i t ion runs.People who areblocking or covering the openingmay not position themselves directlyin the opening to seal off the interioras if the door was closed (seefigure). Competitors are allowed upto six (6) people (co-pilots) to assistthem in the set up for competition.

16. In the closed door rounds, competitors are not allowed to use any type of tie down device to holddoors closed, such as bolts, ratchet straps, rope, etc. Only team members are allowed to hold doorsclosed by pushing against the doors during the run (maximum of two team members per door).

17. Competitors are not allowed to cover up or tape any vents or openings in the vehicle for the purposeof increasing SPL. Vehicles found to have any openings covered or taped up before or duringtesting will receive a score of zero.

18. Pickup trucksthat have an enclosure in the interior compartment of the vehicle (not the bed of thetruck) will be classified as "no wall" vehicles, as long as the enclosure, including all equipmentattached, does not sit higher than the lowest point of the rear window. Pickup truckswith blowthroughs through either the rear cab wall or through the back window will be considered as a wall,whether or not the enclosure is taller than 25 inches or not.

OPEN DOOR

24

DOOR BLOCKERS

24

GENERAL BASS BOXING RULES

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A NOTE ABOUT OUTSIDE SOUND

The concept of outs ide (or externa l ) sound in Bass B oxing compet i t ion is so the spectators can

hear and enjoy the mu sic l ike you dowhen youre driving your vehicle.

Traditional SPL competitions usually dont involve the spectators, so by playing clean, clear musicshows them you appreciate the mids and highs as much as the bass your system can deliver.

Those who are not familiar with car audio only understand what they hear, like the boom, boom, boomof high end car audio systems driving down the street; they dont realize that inside the vehicle, highquality, full range music is playing and can be clearly heard. The goal with the outside sound rule is toallow spectators to hear what we hear on the inside. We know music sounds much better with bass, butuntil someone who is unfamiliar with sound hears that for themselves, theyll never know.

This does NOT mean you have to mou nt speakers on the outs ide of your vehic le. It means that thefu l l rangemusic must be heard outs ide the vehic leclearly and cleanly. If you want to mount speakers

outside the vehicle you may do so, but it is not a requirement

I f you use outside speakers, the speakers do no thave to be permanently mounted to the vehicle ,bu tmust be properly and securely mounted when competing; speakers can be m ountedanywh ere in, on or around the vehicle, so long as th ey are able to be clearly heard outside.

Speakers not permanently attached to the vehicle must be properly mounted in some type ofenclosure. Cardboard boxes, foam molds, sitting on cushions, etc... are not considered anacceptable enclosure for exterior speakers.

The chart below shows you the total amount of square inches of cone area in a pair of standard caraudio speakers; use it to determine what speakers will fit in your Bass Boxing Division. The rules state aminimum amount of cone area for outside sound, but theres no maximum amount, so go crazy if youwant to!

Speaker size conversion chart

Speaker Size 6 6 1/2 5X7 6X9 8 10

SpeakerQty.

Total Square Inches

1 pr. 56.52 66.33 54.96 84.78 100.48 157.00

2 pr. 113.04 132.65 109.92 169.56 200.96 314.00

3 pr. 169.56 198.97 164.88 254.34 301.44 471.00

4 pr. 226.08 265.29 219.84 339.12 401.92 628.00

OUTSIDE SOUND

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VEHICLE CRITERIA

OEM stock interior, except for speaker bui ld outs , kick panels.All interior panels must be inplace and properly mounted. Cosmet icmodifications allowed (addition of full range speakers forsound quality purposes, painting of trim pieces, etc.).

All vehicle features (e.g. windows, air bags, sunro ofs, door handles, locks etc.) mu st work .Allequipment in the vehicle designed by the manufacturer must function as the manufacturer intendedthem to; nothing may impede their proper operation. No convenience or safety features may beremoved from the vehicle.

OEM glass cannot be replaced with any subs ti tute material .

Al l subwo ofers and enclosures must b e mounted in th e OEM cargo area*of the vehicle.*A "cargo area" is defined as a storage section of a vehicle designed specifically to house goods

and not people (Example - the trunk of a car, behind the rear seats of a van, minivan, SUV orhatchback) EXCEPTION:Pickup trucks may have an enclosure in the vehicle interior. Regular Cabtrucks: the enclosure must be mounted behind the seat, between the back of the seat and the cabwall, and cannot be higher than the lowest point of the rear window line, inclusive of all equipmentattached to the enclosure. Extended and Crew Cab trucks: the truck must have the OEM rear seat inplace, the enclosure must be behind the B pillar and not be sitting any higher than the lowest pointof the rear window line.

Vehicles equipped with OEM factory fold down rear seats may be folded down during testing.

Panels or baffles designed to increase SPL, whether attached to the vehicle or enclosure, cannot bemounted in the vehicle interior. Supports, poles or braces are not allowed within the vehicle interior.

Sound Deadening/Reinfor cing -Sound deadening (or dampening) materials may be used behindor inside any factory OEM panels, so long as the factory panel remains intact, unaltered and in its

original factory OEM location. There can be no external visible evidence of the sound deadening(pieces of sound deadening material sticking out from the panels). Competitors are not allowed toreinforce panels with anything other than sound deadening materials.

EQUIPMENT CRITERIA

Speakers - The system m ust have a min imum of 50 square inchesof full range speaker. Coax,component, horns or pro audio speakers are allowed.

Batteries - One (1) battery al lowed. Battery must be mounted in the factory location and must fitwithin the parameters of the OEM battery tray, to a maximum of 700 cubic inches. Battery mus tbeproperly mounted and secured. Except ion:Vehicles with OEM (factory) dual battery setups will be

exempt from the one battery rule. All other battery criteria applies.

Battery trays -Factory (OEM) battery trays are not allowed to be modified in any way toaccommodate larger batteries.

Alternator - One (1) alternator is al lowed. Must be mounted in factory location.

Voltage - Maximum voltage al low ed is 15.5 volts, engine running o r off.

Wiring - Maxim um one (1) run of 0 (1/0) gauge pow er wire (+ or -)is allowed from the frontbattery of the vehicle to the rear.

CRUISERWEIGHT DIVISION(1 to 160 sq. in - No Wall Division)

1 to 160 sq. in = 3-8s, 2-10s ,1-12 inch subwoofer/s

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Amplifier power cannot exceed 2,000 watts peak power (at 2 ohms).

Impedance at amplifier cannot be lower than 2 ohms

Capacitors -Maximum 5 farads allowed

All equipment must be commercially available and can not be modified in any way.

One (1) amplifierperpairof subwoofers is allowed.

Subwoofer walls are no tallowed in this Division; any enclosure taller than the IASCA25 inchstandard will be considered a wall.

Ports - No external ports allowed. Ports cannot protrude from enclosure and must be flush withenclosure exterior. Port surface maximum 14 square inches.

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VEHICLE CRITERIA OEM stock interior, except for speaker bui ld outs , kick panels.All interior panels must be in

place and properly mounted. Cosmet icmodifications allowed (addition of full range speakers forsound quality purposes, painting of trim pieces, etc.).









EQUIPMENT CRITERIA


Batteries - Two (2) batteries al lowed. One (1) battery must be mounted in the factory location andmust fit within the parameters of the OEM battery tray. One (1) battery may be mounted in the cargoarea; no batteries allowed in interior compartment. Batteries mus tbe properly mounted andsecured.

Battery size al lowance -1,400 cubic inches of total battery size is allowed between both batteries

Battery trays -Factory (OEM) battery trays are not allowed to be modified in any way toaccommodate larger batteries.


Voltage - Maximum voltage al low ed is 15.5 volts, engine running o r off.

Wiring - Maxim um two (2) runs o f 0 (1/0) gauge po wer wire (+ or -)is allowed from the frontbattery of the vehicle to the rear.


FLYWEIGHT DIVISION(1 to 240 sq. in - No Wall Division)

1 to 240 sq. in = 3 -10s ,2-12s, or 1-15 inch subwoofer/s

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There are no minimum or maximum power requirements for subwoofers.


One (1) amplifierper subwooferis allowed.


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VEHICLE CRITERIA OEM stock interior, except for speaker bui ld outs , kick panels.All interior panels must be in

place and properly mounted. Cosmet icmodifications allowed (addition of full range speakers forsound quality purposes, painting of trim pieces, etc.).









EQUIPMENT CRITERIA


Batteries - Two (2) batteries al lowed. One (1) battery must be mounted in the factory location andmust fit within the parameters of the OEM battery tray. One (1) battery may be mounted in the cargoarea; no batteries allowed in interior compartment. Batteries mus tbe properly mounted andsecured.

Battery size al lowance -1,400 cubic inches of total battery size is allowed between both batteries Battery trays -Factory (OEM) battery trays are not allowed to be modified in any way to

accommodate larger batteries.


Voltage - Maximum al lowed voltage is 15.5 volts, engine running o r off.

Wiring - Maxim um two (2) runs o f 0 (1/0) gauge po wer wire (+ or -)is allowed from the frontbattery of the vehicle to the rear.


FEATHERWEIGHT DIVISION(241 to 480 sq. in - No Wall Division)

241 to 480 sq. in = 6-10s, 4-12s, 2-15s or 1-18 inch subwoofer/s

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One (1) amplifierper subwooferis allowed.


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LIGHTWEIGHT DIVISION(481 860 sq. in - No Wall Division)

481+ sq. in. = 10-10s, 7-12s, 4-15s or 3-18 inch subwoofers

VEHICLE CRITERIA OEM stock in ter ior forward o f the B pi l lar . Except ion: sp eaker bui ld outs, k ick panels. All

interior panels forward of the B pillar must be in place and properly mounted. Cosmet icmodifications allowed (addition of full range speakers for sound quality purposes, painting of trimpieces, etc.).

Behind the B pi l lar -Factory interior panels do not have to be in place from the B pillar back.



Subwoofers and enclosures must be mounted behind the vehicles B pillar.

Supports, poles or braces attached to the enclosure to secure the enclosure in place are allowed.The supports, poles or braces can be no largerthan 1 square inch in thickness (1.125" round or 1" X

1" square) and no longer than 12 inches in length .

Panels or baffles designed to increase SPL, whether attached to the vehicle or enclosure, cannot bemounted in the vehicle interior forward of the B pillar.

NOTE:Pickup trucks may have an enclosure in the vehicle interior. Regular Cab trucks: theenclosure must be mounted behind the seat, between the back of the seat and the cab wall, andcannot be higher than the lowest point of the rear window line, inclusive of all equipment attached tothe enclosure. Extended and Crew Cab trucks: the enclosure must be behind the B pillar and not besitting any higher than the lowest point of the rear window line. Pickup trucks with a rear window orcab wall blow through are considered as wall vehicles and will reclassified to a higher Division.

Sound Deadening/Reinfor cing -Sound deadening (or dampening) materials may be used behindor inside any factory OEM panels, so long as the factory panels forward of the B pillar remain intact,unaltered and in its original factory OEM location. There can be no external visible evidence of thesound deadening (pieces of sound deadening material sticking out from the panels). Competitorsare not allowed to reinforce panels with anything other than sound deadening materials.

EQUIPMENT CRITERIA

Speakers - The system m ust have a min imum of 100 square inchesof full range speaker.Coax, component, horns or pro audio speakers are allowed.

Batteries - Five (5) batteries al low ed, maxim um 1,200 cub ic inches in s ize each. One (1)battery must be mounted in factory location, all other batteries must be mounted behind B pillar. All

batteries mus tbe properly mounted and secured.

Alternator - Two (2) alternators are al lowed. One must be mounted in factory location.

Voltage - Maximum al lowed voltage is 18 volts , engine running o r off.

Wiring - Unl imited run s of power wire (+ or -)are allowed from the front battery of the vehicle to

the rear.



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There is no limit to the amount of amplifiers a competitor may use.


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WELTERWEIGHT DIVISION(1 to 480 sq. in Division - Walls optional)

1 to 480 sq. in. = 6-10s, 4-12s, 2-15s, 1-18 inch subwoofers

VEHICLE CRITERIA

OEM stock in ter ior forward o f the B pi l lar . Except ion: sp eaker bui ld outs, k ick panels. Allinterior panels forward of the B pillar must be in place and properly mounted.

Cosmet icmodifications allowed (addition of full range speakers for sound quality purposes, paintingof trim pieces, etc.). External and internal aftermarket add-ons such as body kits, wings, wheels,aftermarket seats, steering wheels or any automotive related cosmetic and performance items notrelated to the vehicles 12 volt electrical or sound system are allowed.

All windows in the vehicle forward of the vehicles B pillar, designed by the manufacturer mustfunction as the manufacturer intended them to; nothing may impede their proper operation. Noconvenience or safety features may be removed from the vehicle.

OEM glass forward of the B pillar may not be replaced with any substitute material.

Seats may be removed when competing, but must be in vehicle when entering and exiting the lanes.


Supports, poles or braces attached to the enclosure to secure the enclosure in place, forward of theB pillar, are allowed. The supports, poles or braces can be no largerthan 1 square inch in thickness(1.125" round or 1" X 1" square) and no longer than 12 inches in length.

Flat panels or baffles designed to increase SPL, whether attached to the vehicle or enclosure,cannot be mounted forward of the B pillar.

Pickup trucks with rear window or cab wall blow throughs will be considered as a wall vehicle,regardless of enclosure height.

Competitors are allowed to reinforce behind and inside vehicle panels throughout the vehicle.Panels forward of the B pillar may be reinforced so long as the factory cosmetic panels remain

intact, unaltered and in their original factory OEM location. There can be no external visible evidenceof reinforcement forward of the B pillar.

EQUIPMENT CRITERIA

Speakers - The system m ust have a min imum of 100 square inchesof full range speaker.Coax, component, horns or pro audio speakers are allowed.

Batteries - Unl imited batteries al low ed, maxim um 1,200 cub ic inches in size each. One (1)battery must be mounted in factory location, all other batteries must be mounted behind B pillar. All


Alternator - Two (2) alternators are al lowed.

Voltage - Maximum al lowed voltage is 15.5 volts, engine running o r off.

Wiring - Unl imited run s of power wire (+ or -)are allowed from the front battery of the vehicle tothe rear.



Enclosures taller than 25 inches will be considered a wall. Measurement will be taken from thelowest point in the vehicle where the enclosure is mounted to the highest point of the enclosure. Anyequipment, braces, supports and protruding items will be counted in the measurement.

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EBB 19

MIDDLEWEIGHT DIVISION(481 to 860 sq. in - Division Walls optional)

481 to 860 sq. in = 10-10s, 7-12s, 4-15s, 3-18sinch subwoofer/s

VEHICLE CRITERIA

OEM stock in ter ior forward o f the B pi l lar . Except ion: sp eaker bui ld outs, k ick panels. Allinterior panels forward of the B pillar must be in place and properly mounted.

Cosmet icmodifications allowed (addition of full range speakers for sound quality purposes, paintingof trim pieces, etc.). External and internal aftermarket add-ons such as body kits, wings, wheels,aftermarket seats, steering wheels or any automotive related cosmetic and performance items notrelated to the vehicles 12 volt electrical or sound system are allowed.

All windows in the vehicle forward of the vehicles B pillar, designed by the manufacturer mustfunction as the manufacturer intended them to; nothing may impede their proper operation.

OEM glass forward of the B pillar may not be replaced with any substitute material.

Seats may be removed when competing, but must be in vehicle when entering and exiting the lanes


Supports, poles or braces attached to the enclosure to secure the enclosure in place, forward of theB pillar, are allowed. The supports, poles or braces can be no largerthan 1 square inch in thickness

(1.125" round or 1" X 1" square) and no longer than 36 inches in length .


Competitors are allowed to reinforce behind and inside vehicle panels throughout the vehicle.Panels forward of the B pillar may be reinforced so long as the factory cosmetic panels remainintact, unaltered and in their original factory OEM location. There can be no external visible evidenceof reinforcement forward of the B pillar.


EQUIPMENT CRITERIA

Speakers - The system m ust have a min imum of 150 square inchesof full range speakerplaying the music so that it can be heard externally from the vehicle during competition. Coax,component, horns or pro audio speakers are allowed.

Batteries - Unl imited batteries al low ed, maxim um 1,200 cub ic inches in size each. One (1)battery must be mounted in factory location, all other batteries must be mounted behind B pillar. All


Alternator - Three (3) alternators are al lowed.


Wiring - Unl imited run s of power wire (+ or -)are allowed

Capacitors -Unlimited amount allowed


Enclosures taller than 25 inches will be considered a wall.

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EBB 20

HEAVYWEIGHT DIVISION(861+ sq. in - Wall Division)

861+ sq. in = 11+10s, 8+12s, 5+15s, 4+18s inch subwoofer/s

VEHICLE CRITERIA

Interiors can be modified, with certain exceptions; exceptions are listed below.

Custom bui l t dashboardsare allowed. Custom built dashboards cannot extend any higher thanthe 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 thevehicle through the width of the vehicle at the joining point.

Seats may be removed when competing, but must be in vehicle when entering and exiting the lanes



Supports, poles or braces attached to the enclosure to secure the enclosure in place, forward of theB pillar, are allowed. The supports, poles or braces can be no largerthan 1 square inch in thickness

(1.125" round or 1" X 1" square) and no longer than 36 inches in length .

All OEM factory windows in the vehicle may be replaced with any transparent material.

Competitors are allowed to reinforce behind and inside vehicle panels throughout the vehicle.


EQUIPMENT CRITERIA

Speakers - The system m ust have a min imum of 150 square inchesof full range speaker.Coax, component or pro audio speakers are allowed.

Batteries - Unl imited batteries al low ed, maxim um 1,200 cub ic inches in size each.Allbatteries

mus tbe properly mounted and secured.

Alternator - Unl imited amou nt of alternators are al lowed.


Wiring - Unl imited run s of power wire (+ or -)are allowed from the front battery of the vehicle tothe rear.

Capacitors -Unlimited amount allowed


Enclosures taller than 25 inches will be considered a wall. Measurement will be taken from thelowest point in the vehicle where the enclosure is mounted to the highest point of the enclosure. Anyequipment, braces, supports and protruding items will be counted in the measurement.

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EBB 21

GLOSSARY OF TERMS

The following are terms used by IASCA, its judges and competitors. This section is to help thoseunfamiliar with the terms used to better understand them.

Baffle/s - Panels built, or created specifically, to redirect air flow, or enhance the performancecharacteristics of a sound system, its components or installation.

Blockers - People (Team Members) used to block a door opening in an effort to increase the SPL

generated by the vehicle.

Cargo area - The common area in a vehicle used to store cargo. In a car, the cargo area would be

referred to as the trunk, or boot. In trucks it is referred to as the bed, or box. In minivans, SUVs and

crossover vehicles, it is the area directly behind the second row of seats.

Drivers seat - In IASCA competition, the term refers to the main seat used to operate the vehicle in

normal driving conditions. It is the seat immediately behind the vehicles steering wheel with access to

the gas and brake pedals.

Enclosure - More commonly referred to as a sub box or box, the enclosure is the fabricated box

that houses the subwoofers.

Factory or OEM - OEM is an abbreviation for Original Equipment Manufacturer, referring to both the

automotive and mobile electronics industries, for the purposes of these rules. When OEM is referred to

through this text, it signifies the original equipment the vehicle or components came with from the factory

when it was originally assembled.

Full Range Music - Ful l Rangemusic is the representation of all musical frequencies in the sound

spectrum. In regular terms, this means that the bass, mid bass, midrange and high frequency levels are

being played at the same output level, evenly represented.

Mounted Properly and Securely - This refers to any vehicle or system components that have beenadded to the vehicle. Properly means the use of proper materials to mount a component ( example -

using a proper battery tie down to hold a battery in place, not bungee cords, rope, cable ties, etc.).

Securely means that the component being mounted does not move loosely in its position ( example -

using screws in the proper mounting holes for an amplifier and screwing them into a solid piece of

material in the vehicle, not Velcro across the bottom of the amp stuck to the floor carpet).

Pillars - The posts that hold up the roof of the vehicle. Pillars are referenced from front to rear

alphabetically; the front pillars at the windshield are commonly referred to as the A pillars, the next set

of pillars rearward are referred to as the B pillars and so on.

Vehicle - The word vehicle is used as a general term referring to all motor powered cars, trucks, vans,

SUVs, Crossovers and minivans. To qualify as a vehicle under IASCAs definition, the unit used to

house the sound system being evaluated must have a motor that powers it, a transmission, an electrical

system, a front and rear axle (one of which must be the driving axle and the other a steering axle), a

steering wheel and a seat from which to control the unit while it is in motion. A trailer with a tow vehicle

attached does not meet the definition; it must be one unit containing at minimum all of the above criteria.

Wall - Wall is a term used in reference to the type of subwoofer enclosure used in a vehicle. IASCAs

definition of what constitutes a wall is any subwoofer enclosure that exceeds 25 inches in height,

including all attached equipment, supports and braces used to hold the enclosure in place.

bb rules 2013 rev

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