Hi, I have had this infuriating problem with this unit for a little while now. My Xbox 360 is connected to the receiver via an Optical cable, and I'm using the DVD input of the receiver. Whenever I want to listen to music on my B Speaker (connected to 2 speakers elsewhere in the house), the amp automatically shuts down and goes into standby mode if the volume exceeds the -20db range. It does this if B speaker is ON by itself or if both A and B are ON at the same time. There is no problem with A by itself though... Help!
You will have to disconnect the B speaker wires and disconnect the speakers and measure the wire with nothing on the wires as it sounds lkike you may have a pinched wire or shorted wire somewhere, or the B speakers one or both are bad. I am leaning towarods the shorted or pinched speaker wires. I say this because if there was an amp problem, it would happen on the A speakers too as the speaker A and B is nothing more then a switch to turn the desired speakers on and off. Good Luck
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