I've got an Onkyo TX-SR606 that produces subwoofer hum. I've tried two different subwoofers with the same results. I've purchased new cables to connect the subwoofer to the receiver with no change in ...

Of all the annoyances that can afflict any audio/video home theater or even a simple stereo installation, the notorious “ground loop” may well be the most difficult and persistent one to track down ...