I'm working on hooking up my new htpc using the htr 6160 multi channel out. When I use the 6 channel (uses center, sub, front left and right, and side left and right) everything works fine. When I choose to do 8 channel, I have to use the front left and right inputs for the rear surround speakers (that's what it tells me to do) and I have to select a separate input (i can choose between several) for the front speakers. When I do this, the front speakers, center and sub, and the side surrounds work fine, but the rear surrounds (plugged into the front channel inputs which worked in 6 channel mode) don't work)... anybody have any suggestions? sorry if that was complicated, let me know if i need to clear anything up. thanks.