@almarg-
Hum still present when amp turned on w shorting plugs in input RCAs. With nothing connected to the inputs (not even shorting plugs), I get a loud buzz; much louder than hum but I believe it "on top" of the hum.
Hum still present when amp turned on w shorting plugs in input RCAs. With nothing connected to the inputs (not even shorting plugs), I get a loud buzz; much louder than hum but I believe it "on top" of the hum.