The last few days I have noticed my speakers buzzing, typically this is heard when wires are touching the wrong thing.
Unplugged all speaker wires, but the buzzing is still there
Turned off all devices except receiver, but buzzing is still there
Switched Sound type from Surround to Stereo, and buzzing is NOT there.
Is it odd that there would be speaker feedback when on Surround mode, but not Stereo? When switching through Surround modes, sometimes the feedback would be louder than others.
This does happen no matter which input the receiver is set to. Is this just dust accumulation inside the receiver?