Custom Autosound Mfg., Inc. established in 1977, started manufacturing AM/FM cassettes in 1981. We now have eight models available! They are shipped 'bare' from overseas to Fullerton CA, where our technicians 'kit' (modify) them for over 400 different makes and models of classic cars and trucks (vehicle logo/trademarks optional) (see application guide). Ditto on the dual front and DVC (two channel) speaker assemblies & upgrades for original speaker areas of classic cars!