They probably sounded much better than the standard stereo system.Originally Posted by ChrispyFish
The option was less than 1000 according to this sheet.
From what I have read it was better than the standard Harman Kardon DSP option, while both systems used the same DSP amplifier.
That would not make sense to buy a used set these days.
I can show you my own sound system in the E39 if you are around Blanch one of those days. 80% finished but all speakers working and pulsing good.