Bang and Olufsen unveiled its newest Soundstage car stereo setup for the Audi Avant A4 today. Through True Image Digital Signal Processing they’ve managed to turn 2 channels into a virtual 7.1 surround sound experience. Utilizing a microphone placed between the driver and shotgun seats, the system adjusts volume and equalization according to road and engine noise. Sound can be optimized for each passenger in the car through fine tuning of the systems 14 loudspeakers, 10 amplifier channels which are powered by 505 total watts.
More info here.