Here is my idea (Illustrated in confusing picture). I want to combine my HT and 2 ch to create one system that fits a little better in a house, yet still sounds as good as my 2 ch. As good as my Marantz pre/pro sounds for HT, it's not very musical and 2 ch is not its forte. So, what if I built two "Y" interconnects that went from my pre/pro and preamp to my main amp and my subwoofer amp. Those are the only two systems that would be used for both music and movies, so all the rest of the equipment would be independently controlled by the pre/pro. Would a "Y" IC create any problems as long as only one pre was on at a time?