Get a budget line conditioner, I had hum from a computer i was running into my stereo, plugged computer into the LC and problem solved
Counterpoint SA 220
I recently purchased a Counterpoint SA 220. It's in very good condition and sounds great... just as I remember my SA 12 sounding.... BUT, I can't get rid of the hum. You think I should replace the tubes? Has anyone had in luck getting these to quiet down?