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USACi RulesSPL Class & Division LimitsSQ Class Structure
Downloadable PDF FilesSo You Want to Compete, a Beginners Guide
 

These rules were written by the United States Autosound Competition International (USACI) Rules & Ethics committee to retain the basic ideas that have always made auto sound competition fun and competitive. Each year USACI seeks input from its competitor members ... the goal being to make the contests fair, fun and challenging. These rules and any subsequent refinements are the result of that input. It is USACI’s sincerest hope that these rules will be received as an example of its continuing effort to promote the auto sound industry.

The rules set forth on this site shall be used by the USACI official(s) and/or judging staff at all USACI sanctioned events. It is the responsibility of officials and staff to adhere to these rules to the best of their ability. In consideration of that, each competitor should read these rules and have a thorough understanding of their meaning when designing or improving a competition mobile audio system.

The rules herein contained, supersede any and all previously written USACI rules or guidelines. USACI reserves the right to make written amendments to these rules without prior written notification to its members. USACI will make every effort to notify active members via the Internet of any written changes. Internet notification will be via the Official USACI Web site at: www.soundoff.org. All competitors and enthusiasts are encouraged to visit our site frequently for rules, event schedule and event results.

Best regards,

Ralph Randall
President, USACI

© Copyright 1986 - 2011 United States Autosound Competition International, Inc. 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.

 
Classes shown in RED are available to consumers only; classes shown in Green are open to all competitors.
These specifications apply to the 2011 season.
 
Division & Power
Class
Amplifier Quantity Allowed Vehicle Interior Modifications Battery
Quantity
Allowed
Caps
Alternators Max Volts Max RPM's
Street Beat Divisions
Street Beat - 1 Unlimited Limited* 2 + Stock Unlimited 1 15.5 1200
Street Beat - 2 Unlimited Limited* 4 + Stock Unlimited 1 15.5 1200
Street Beat - 3 Unlimited Limited* 6 + Stock Unlimited 1 15.5 1200
Street Beat - 4 Unlimited Limited* Unlimited Unlimited Unlimited 15.5 1200
Street Beat - 5 Unlimited Limited* Unlimited Unlimited Unlimited 18 1200
Stock Divisions
Stock 0-600 Watts 1 No 1+ Stock** Unlimited Unlimited 15.5 1200
Stock 601-1800 Watts 3 No 3+ Stock** Unlimited Unlimited 15.5 1200
Stock 1801+ Watts Unlimited No Unlimited Unlimited Unlimited 15.5 1200
Super Stock Divisions
Super Stock 0-600 Watts 1 Behind "B" Pillar - Below Glass 2 + Stock Unlimited Unlimited 18 1200
Super Stock 601-1800 Watts 3 Behind "B" Pillar - Below Glass 6 + Stock Unlimited Unlimited 18 1200
Super Stock 1801+ Watts Unlimited Behind "B" Pillar - Below Glass Unlimited Unlimited Unlimited 18 1200
Modified Divisions
Modified 0-1000 Watts 2 Behind the "B" Pillar 6 + Stock Unlimited Unlimited 18 1200
Modified 1001-2000 Watts 4 Behind the "B" Pillar 12 + Stock Unlimited Unlimited 18 1200
Modified 2001-4000 Watts 8 Behind the "B" Pillar 18 + Stock Unlimited Unlimited 18 1200
Modified 4001+ Watts Unlimited Behind the "B" Pillar Unlimited Unlimited Unlimited 18 1200
Super Modified Divisions
Super Modified 0-4000 Watts 8 Yes Unlimited Unlimited Unlimited 18 1200
Super Modified 4001+ Watts Unlimited Yes Unlimited Unlimited Unlimited 18 1200
Trunk Divisions
Trunk 0-1000 Watts 2 Trunk Only 2+ Stock** Unlimited 1 15.5 1200
Trunk 1001+ Watts Unlimited Trunk Only Unlimited Unlimited Unlimited 15.5 1200
Port Wars Division
Port Wars Unlimited Yes Unlimited Unlimited Unlimited 18 1200
Super Port Wars Unlimited Yes Unlimited Unlimited Unlimited 18 1200
               

* INTERIOR MODIFICATION LIMITS: No constructed enclosure or speaker placement that may manipulate the SPL sensor may be placed forward of the "B" pillar and will be considered reason to reclassify the vehicle to the Port Wars or Super Port Wars divisions or disqualification. This decision will be at the discretion of the head judge. Factory or factory replacement front seats must be installed in the vehicle in factory locations. Must have the front bench or both front seats. No woofers larger than 8" inches may be forward of the "B" pillars.

** BATTERY LIMITATIONS: 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. A 12 volt battery is defined as a battery that has a nominal terminal voltage of 12-Volts, consists of 6 internal series-connected cells, and is lead/acid or gel-type. A 16 volt battery is defined as a battery that has a nominal terminal voltage of 16-Volts, consists of 8 internal series-connected cells, and is lead/acid or gel-type. A battery shall have no more than two “unique” battery terminals connected to the system, one being positive and the other being negative. Batteries with more than two posts connected to the vehicle or system will be counted as multiple batteries. Batteries that exceed these 800 cubic inches or exceed allowed number of cells will be considered multiple batteries.   (Example: 801-1600 cubic inches is tow batteries. 12 volt battery with 7 to 12 cells would be two batteries, and so on). 

These limitations apply to all classes with defined battery limits. Any class and/or division that allows unlimited batteries will not be bound by this definition
 

Street Q SPL Crossover
Intro SQ+ SQ- Install - SPL
Modified SQ SQ - Install
Modified SQ+ SQ - Install - SPL
Modified Q SQ (1 seat)
Super Mod SQ SQ - Install
Super Mod SQ+ SQ - Install - SPL
Super Mod Q SQ (2 seat)
Xtreme SQ SQ - Install
Xtreme SQ + SQ - Install - SPL (1 seat)
 
2011 Competition Rules 2011 SQ Score Sheet
Outlaw SPL & Street Beat Rules - Download All In One Score Sheet - Download
SQ Rules - Download  
Mini SPL Rules - Download  
   
   
   

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