Great writeup Ken. Why on earth manufacturers do this is beyond me. How are other brands -- MB, Audi, Lexus, Acura, Volvo, etc? Are they that bad too?

I was really surprised that the rear speakers have such 'holes' in the frequency response and don't even play full range! I though it was a two way system back there -- apparently there are no tweeters.

I have the regular (Non DSP) stereo in my X5 and my shop did the same thing you guys did for a subwoofer -- they just tapped into the low frequency wires with a high to low level converter. We added a Alpine 4313 to adjust the bass and all is well...

Have you guys had a chance to play with the new Logic 7 systems yet? I'm not sure I want to even touch that one, I heard they are using fiber optics and an interface similar to Firewire now? Yeesh....

Chris