Caraudioforum.com
The WWW Car Audio Forum. The Internet's best established Web based forum devoted to Car Audio; Friendly, Flame free, car audio discussions.
http://www.caraudioforum.com/

Caraudiomag.com
Car Audio and Electronics, The Authoritative Electronic Source.
http://www.caraudiomag.com/

Car-audio.net
Welcome to car-audio.net! The Online source for Car Audio information. The purpose of this site is to keep fellow car audionauts informed on upcoming shows, and general information concering Car Audio.
http://www.car-audio.net/

CarSound.com
A comprehensive listing of car audio products, as well as reviews, columns, q&a, and more.
http://www.carsound.com/

Carstereoreview.com
Test reports and articles about car stereos.
http://www.carstereoreview.com/

Carstereos.org
CarStereos.org is the source for all info on Car Audio, including chat rooms, tips, message forums, reviews, shopping, CD reviews, e-mails and more!!
http://www.carstereos.org/

Elitecaraudio.com
The largest and most informative car audio site on the net featuring show coverage, message forums, chat rooms, news, product reviews, auctions, and more.
http://www.elitecaraudio.com/

The Install Doctor
The Do-It-Yourself Car Stereo Installation Resource.
http://www.installdr.com/

International Auto Sound Challenge Asso.
News, events, and judges training announcements.
http://www.iasca.com/

Ofsoundmind.com
Of Sound Mind Car Audio Technical Pages.
http://www.ofsoundmind.com/

United States Autosound Competition.
The Official USAC Home Page detailing competition car audio. Valuable USAC information with links to other official sites that support mobileaudio competition.
http://www.soundoff.org/