"What would I hear if there was a problem like a ground or earth loop?"


A VERY audible huuuuuuuuuuuuuuuuuuuuum. BTW, no hum found in DSP speakers.

One way to tell for cetain (just for this brief minute) is to lift the ground at the receptacle. No, hum...then it's a ground loop in your electical system. Hum...then it's something in your AV system.

Jay