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There are also CD changer with digital output as Sony ES where you can build a custom DAC (see my CDPlayer page) to get a better result! Ofcourse if you think to build a custonm DAC for car and to have less problem with power supply voltage you must choice a DAC kit with only 5volt (see Cristal) and no BurrBrown that need +-12v! But if you want ear also the radio and don't like the CD changer solution you can buy the last generation of Blaukpunt car radio: the Digiceiver. These radio are complete digital because use for tone control, equalizer and volume a DSP (digital signal process). Also high price models of Pioneer and Philips now use this solution. this story will continue ...
Amplifiers - kit and commercialHere a Hi-End Single Ended Pure Class A Car Amplifier
without DC-DC converter (the inductance duplicate the voltage swing)
This type of design has been used in a commercial product for home called Twin Tower by Pathos (italy).
In this product the Mosfet was in cathode follower configuration.
ofcourse the inductance is not very little.
this project will continue in the future ...
Loudspeakers - custom and commercialFor the car loudspeakers only this choice:
Fostex FE103S front door + Simmetric load subwoofer with a good pair of 8" about the Fostex
see my "Full range" page on "Loudspeakers" section the project will be published soon!