Dual Zone Head Unit
Check this out... Ugly Head Unit but it has Dual Zone capability. I am thinking about pumping carputer audio through the rear channels so that passengers can watch DVDs in headrests while the front passengers can still listen to the radio or god forbid a cassette tape! Crazy idea...
ummm unless you have an uber long car wouldnt that just sound like *** since all the noise would combine (or maybe a car like a cab or limo with a plexiglass divider)