I recently set up a cheap little A/V system with parts my friend gave me. It sounds pretty good, but when I attach my VCR (still have one...) to the input on my Sony TA-AX380 control amp, I get a ...

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 ...