I just got the DS7200 home theater system (one of the last, I gather). I like the design (especially putting all the power amps in the subwoofer) and the piano-finish speakers a lot. It also sounds great -- except for a static crackling noise that is very noticeable. The noise comes evenly from all five speakers and is not affected by the volume setting. It is audible anywhere in the room when there is no source and close to the speakers when music is playing. All my system components are on the same electrical circuit (and anyway unplugging all connections from the preamp except for the subwoofer / power amp does not affect the noise). It does vanish, though, as soon as I turn off or disconnect the preamp (even without turning off the subwoofer / power amp). I have tried resetting the preamp by pushing the three front panel buttons as indicated in the manual, but that did not affect the noise. Have I got a defective product or is there something else I can try?
If it is defective, now that the DS7200 has been discontinued can I still get a replacement preamp if it can't be repaired? If I have to return it, can I just bring the preamp to the dealer or do I have to box up the subwoofer and cart it down too?
Also, on operation, is there any way to set the surround sound mode for each source, so that it doesn't revert to stereo every time I switch back to a component?