This section of the USACI rule book was written by the USACI Rules & Ethics committee in order to retain

the basic ideas that have always made auto sound competition fun and fair. Each year, USACI hosts a

membership meeting to gain input from its competitor members, the goal being to make the contests fair, fun

and challenging. This rule Book and any subsequent refinements are the result of those meetings. It is

USACI’s sincerest hope that these rules will be received as an example of the organizations continuing

efforts to promote the auto sound industry.

The rules set forth in this section of the rule Book shall be used by the USACI official(s) and/or judging staff

at all USACI Sanctioned events. It is the responsibility of event officials and staff to adhere to these rules to

the best of their ability. In consideration of that, each competitor should read this manual and have a

thorough understanding of its contents when designing or improving a competition mobile audio system.

Ultimately, it is the competitor’s responsibility to know and adhere to the rules contained herein.

USACI reserves the right to make written amendments to this rule Book without prior written notification to

its members. USACI will however, make every effort to notify active members via the internet and/or by

distributing any written changes during the registration process of a sanctioned USACI contest. All

competitors and enthusiasts are encouraged to visit our web site at www.usaci.org for rules updates, event

schedules and event results.

Best regards,

Ralph L. Randall

President, USACI

All rights reserved. No part of this publication may be reproduced, transcribed, stored in a retrieval system,

or translated into any language or computer language, in any form or by any means, electronic, mechanical,

magnetic, optical, chemical, manual or otherwise, without the prior written permission of United States

Autosound Competition International, Inc.

Outlaw SPL divisions are based on the configuration of the system and vehicle. Specific

guidelines for each division will be discussed in their respective sections of this book.

BATTERY LIMITATIONS DESCRIBED:

The physical size of each battery is limited to 800 cubic inches (13110 cubic cm) or less. (Height x Length x Width. Excluding the battery terminals.) The physical shape of the battery is irrelevant. These size limitations apply only to Stock 0-600, 601-1800 and 1801-300. Any class and/or division that allows unlimited batteries also allows batteries of any size.

Stock

0 - 600 watts (max 1 amplifier, 1 Battery + Stock)

601-1800 watts (max 3 amplifiers, 1 Battery + Stock)

1801-3000 watts (max 4 amplifiers, 2 Batteries + Stock)

3001 & up watts (unlimited amplifiers, unlimited batteries (size and quantity))
 

Pro Stock: ( Pro Stock is an open class at single & double point events. )

0 - 600 watts (max 1 amplifier)

601-1800 watts (max 3 amplifiers)

1801-3000 watts (max 4 amplifiers)

3001 & up watts (unlimited amplifiers)
 

0-1000 watts (max 2 amplifiers)

1001-2000 watts (max 4 amplifiers)

2001-4000 watts (max 8 amplifiers)

4001 & Up watts (unlimited amplifiers)
 

Super Modified: ( Super Modified is an open class at single and double point events )

0-2000 watts (max 4 amplifiers)

2001-4000 watts (max 8 amplifiers)

4001-8000 watts (max 12 amplifiers)

8001 & Up watts (unlimited amplifiers)
 

One amplifier is considered one power supply, one system board, driving 1 or 2 channels. A 3-4

channel amp would be considered two amplifiers. A 5-6 channel amp would be considered three

amps and so on. A single heat sink with more than one power supply or system board may be

considered more than one amplifier.

A car audio system’s total wattage shall be determined by the highest manufacturer rated output

divided by the proper number to ascertain the 4 ohm power output, or the manufacturer’s 4 ohm

rating, whichever is higher. If any amplifiers rating cannot be determined, that amplifier will be

moved to the highest power class in that division until such time as a rating can be determined.

USACI reserves the right to independently test any amplifier to determine the true RMS power

rating and reclassify that amplifier as needed.

A competitor may not compete in a power class other than the one that his/her total system

power dictates.

Any and all amplifiers within the vehicle under test will be included in the system’s total power.

This sum will not include the power, if any, of the systems source unit (radio, cassette tape or CD

player) unless it is actively driving a speaker or a group of speakers. All amplifiers in the vehicle

must be operational and actively used in operating the sound system during testing or be

physically removed. At local events amplifiers may be left in the vehicle provided the event

director has the ability to definitively determine the amplifier is not in use.

Competitors whose systems include amplifiers that are not manufacturer rated, are modified

internally, or not commercially available will be required to compete in the unlimited power class

of their respective division.

Power Source: All audio equipment must derive its power from the vehicle power source. No

external power sources (battery chargers, etc.) will be allowed. In the case of a podium, power

must be drawn from the vehicle power source.

The test vehicle’s engine may be running during testing, but will be limited to 1200rpm. The

vehicle’s emergency brake must be set during testing. The Meter and/or SPL sensor may not be

placed in any position that may cause damage to them.

Outlaw SPL judges shall be appointed by the head judge or the event sponsors and are subject

to approval by USACI. A USACI Outlaw SPL judge shall not be allowed to judge any vehicle

being entered by an immediate family member, employee, employer or substantial customer. The

head judge may appoint an alternate to judge that vehicle. It is within the head judge’s or other

USACI Outlaw SPL official’s authority to decide the application of this rule to any disputes.

The head judge will determine if there is a specific judging order. Judging will end when all

vehicles have been judged. No score or refund will be given to a competitor who fails to have

their vehicle in the judging line before the judging has ended.

Any competitor who allows or causes more than a 5 minute “gap” between cars at the judging

station may have 1 point deducted from their highest score at the discretion of the event director.

Outlaw SPL reserves the right to run an event using either an in-place or specific order judging

routine. At any event it is the responsibility of the event coordinator or head judge to inform the

competitors involved of the details of that day’s judging format.

Some Outlaw SPL events may form two or more judging lines in order to expedite the judging

process. In such cases all competitors in a particular power class and division will be judged in

the same line. If an event is scheduled for more than one day, then all competitors in a particular

power class and division will be judged on one day only. It is the responsibility of the competitor to

seek confirmation of which day his or her power class and division is to be judged.

At an Outlaw SPL event, judging shall be conducted with each competitor’s vehicle being driven

through a judging line in an orderly fashion and under its own power. The vehicle must be

capable of entering and exiting the judging area under its own power. Vehicle malfunctions may

be an exception to this rule and will be evaluated by the head judge on an individual basis.

An equipment or vehicle malfunction is the competitor’s responsibility. Once the vehicle is in

position to be judged, the competitor shall be allowed a maximum of five minutes to correct or

repair any malfunction. After the five minutes have expired, the vehicle must be judged if possible

or given a score of zero. No repairs will be allowed after SPL testing has started. No refunds will

be given.

At most events competitors will be allowed to rerun their vehicle to improve their score or

standing. If a competitor chooses to rerun his or her vehicle, the sound system must be made up

of the same size speakers, the same number of speakers, and the same number of amplifiers as

was in the vehicle on its first SPL attempt. A change in brand or power rating is acceptable

provided the new equipment does not change the power class or division of the vehicle. There

will be an additional fee for reruns. All competitors must have an operational system in their

vehicle at the time of registration. This system must be the system the competitor competes with

at the event. Competitors may change equipment in case of malfunction, but entire systems and

enclosures may not be swapped.

Intent: The intent of this rule is to prevent competitors from sharing the same audio system in

more than one vehicle.