Hi there, I recently purchased a used Pioneer VSX-922K AV receiver and have had multiple issues with it, from the right channel being quiet (tapping the back panel usually sorts it) to it randomly turning off and requiring unplugging to get it back on. The only issue I have been unable to find a fix to is that neither of the subwoofer outputs work correctly. I am using an external car amp which has a built in dB volume level indicator, and this was pulsing with the music using my previous receiver, but with this one it remains with a constant signal. This signal remains even when the reciever is on standby, but the subwoofer plays nothing as if it were either high in pitch or some form of incorrect signal. Either way the signal never changes whether playing music or not. Any suggestions would be greatly appreciated as I have sold my previous receiver and do not want to give up this one! The subwoofer did seem to react to the auto-setup with the mic, but it seemed to output audio on every channel test. This is the only time it has ever made a noise with the amp.