ricky
Well-known member
MF had a sale last week and I got an ART CoolSwitch Pro for like $30. I wanted to use it between my RM20 and RM50 but one side of the device keeps humming not matter what. I switched out cords, tried another Switcher, switched the ground on the switcher, etc. and still a hum. I did try another switch which was the exact same one. Is there something between the amps going on that I need to be aware of and change?