Information on designing and building loudspeakers.

Online collection of articles published with the goal of helping people involved with car audio and security.

Specializes in audio and video products. Hong Kong, China.

This site is dedicated to VW Audio systems, specifically the Aktiv system found in many VWs from 1989 to 1992. There is info on how to replace this system, and you can also see the system I've installed in my 1990 VW Corrado.

Car audio technical information with more than 125 individual pages, 50+ calculators and wav files. The covered topics range from basic electronics theory to more advanced topics such as speaker impedance as it relates to frequency, damping factor and signal to noise ratio.

SpeakerBuilding.com is a resource for DIY loudspeaker design and construction.

CarAudio Planet - Pictures , articles , reviews , forums and more. Your one stop shop for everything mobile electronics.

Car audio installation guides to help with your custom stereo system. Wiring diagrams, tool downloads, guides and tips to get your car audio system sounding loud and clear.

EliteCarAudio.com Your One Stop Mobile Audio Head Quarters

Manufacturer of car MP3 and MP4 player with built-in FM transmitter. China.