In Reply to: amp/dsp question for Anthony posted by Chuck on January 03, 2000 at 23:09:40:
The switch is a dynamic spatial expander circuit. This is not a function of the radio as it controls the amplifiers DSP.
As far as H-K specs are concerned, there is a reason for "not" seeing detailed power ratings. It would be easy to just say that the amplifier is 25 watts x 10 but this would not really be true and the explanation, for most consumers, would be very complicated to understand. This has happened in the past and some have even challenged BMW, so they stopped giving power specs.
The issue here is that the H-K amplifier has 10 separate "mono" amplifiiers and each amp has an electronic crossover network diving the audio bandwidth. Some channels for bass; some tweeters and some mids. While it is true that that each individual amp (inside the one amp-box) has an IC rating of 25 watts, by time the crossover filters out certain frequencies, like bass for the tweeter drivers, the energy gets reduced. This is to say that the tweeters, mids and subs get varying amounts of energy at a given time due to the filtering and crossover slopes. This is how a crossover works. It gets even more involved but I will not get into it at this point.
Pleasde keep in mind that I do not work for BMW anymore so my replies are now "not official". I am sharing this info to you as just a fellow BMW and audio enthusiast.
(sorry for the legal-beagal" statement. Just want to protect my ASS-ets:):)