I want to use the 7 channel stereo but the amp is only showing and outputing 5 channel stereo at the moment. I have wired up one pair of speakers to Surround A and one pair to Surround Back/Multi Zone. The Dolby Digital 5.1 is working fine outputting to the speakers on Surround A. The speakers wired to Surround Back/Multi Zone are in the kitchen so I'm not interested in using them as surround back speakers. The manual isn't particularly helpful. Should I be connecting to Surround B? Are there any other options in the menus that I should change. I have told the amp on the speaker setup that I have speakers connected to the Surround Back and have tried them in both Surround Back and Multi Zone on the menus with no luck.