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 ...

There wasn't even any hiss or 60Hz hum out of it, just pure unadulterated sound. I plugged it in at home and you can hear a buzzing sound, I'm guessing it's at 60Hz. There's some hiss, but that's ...