I've already read the other posts on sub buzz which were informative but my problem is that yes, I have the buzz - ha ha - but it goes away once I stamp on the floor. could this still be cured by using a ground loop isolater or a cheater plug as they say? What is a cheater plug btw? I have a 3 pronged plug on my powered sub. Any help is appreciated due to my downstairs neighbours going bananas with the sound. thx!!