Passive Crossover Tutorials
Tutorial for car audio crossovers, their operations and installation of. Includes introductions and tutorials on mobile loudspeakers.
http://www.passivecrossovers.com/

Carsound Magazine
Listing of car audio products, as well as reviews, columns, questions and answers, and forums.
http://www.carsound.com/

Car Audio and Electronics Magazine
Official website of the newstand magazine. Browse recent articles, reviews and events.
http://www.caraudiomag.com/

SpeakerBuilding.com
Resource for loudspeaker design and construction detailing car audio, home audio and pro audio.
http://www.speakerbuilding.com

Canadian Car Audio
Car audio news, tips, reviews and discussion forums, specializing in Canadian-based installs.
http://www.canadiancaraudio.com/

TermPro Car Audio
Car audio resources with news, reviews, discussions and event coverage.
http://www.termpro.com/

Install Doctor
Free car stereo installation resource. Step by step installation instructions complete with photos, tool list, and wiring detail.
http://www.installdr.com/

Jay's Aktiv Audiophile Page
Dedicated to car stereo upgrade and replacement of all Volkswagens with the Aktiv system. Read technical papers, tutorials and learn about the history of the popular VW stereo system.
http://www.corrado-club.com/aktiv/

Car Audio Planet
Discussion forum, images, and news for competitive car audio enthusiasts.
http://www.caraudioplanet.com/

Custom Car Stereo Reference
Online collection of articles published with the goal of helping people involved with car audio and security.
http://ccs.exl.info

W-Body Car Audio
Find specific fitments and projects for cars. Includes articles, and information on installation kits and accessories.
http://incolor.inetnebr.com/weisinator/

Alarms and Security UK Directory
Find car alarm and vehicle tracker system specialists throughout the UK with the nationwide directory of security specialists
http://www.alarmsandsecurity.net/

Elite Car Audio
Features reviews, install advice, install galleries, news and online forum.
http://www.elitecaraudio.com/

Car Audio Installation
Offers tool downloads, links, diagrams, and installation guides.
http://caraudio.biggz.com/

The12volt
Technical information for mobile electronics installers with diagrams charts and calculators for Ohm's law relays diodes resistors, and vehicle specific wiring locations.
http://www.the12volt.com

Basic Car Audio Electronics
Provides technical definitions on basic equipment and principles.
http://www.bcae1.com/

Of Sound Mind
Resource for answers to car audio related questions and troubleshooting.
http://www.ofsoundmind.com/

LoudSpeakerBuilder.ca
Information on designing and building loudspeakers.
http://www.members.shaw.ca/loudspeakerbuilder.ca/