My 773 started to show a loud sub-woofer "bump" every time a switch surround modes, or press Tone defeat, or change anything in menu - speaker setup. The "bump" makes all room windows shake. Does anyone experience this problem? Any suggestions? Thanks
Robert, The problem apppeared last week, after 3 months using the system. I didn't change anything before the "bump" started to show up. After that I already tried other cables and checked main power phase and ground. Nothing made a difference. I'll return the unit. Thanks anyway. Dary