I'm trying to figure out a way to deal with a ground loop problem I have at home, this is 60hz mains hum that comes out of speakers, even when nothing is connected to the device besides power cable. I ...

Hello all A/V demigods,<P><B>Short version:</B> When playing sound from TV or computer to my amp, I get a 50-60Hz hum over the sound. This does not happen when only TV / only computer are ...