My wife's Audi has a terrific sounding B&O sourced system, it's among the best I've heard. Hyundai features a Lexicon system that sounded great on a brief test drive. On the EQ front, I didn't check out the Volvo, but this looks promising:
http://www.socaltech.com/audyssey_designed_into_volvo_s6_/s-0026770.html
I have no idea if any of this stuff is available in the aftermarket, but - if not - maybe you should just replace the car ;-}
Marty
http://www.socaltech.com/audyssey_designed_into_volvo_s6_/s-0026770.html
I have no idea if any of this stuff is available in the aftermarket, but - if not - maybe you should just replace the car ;-}
Marty