What a friendly bunch here...

Candyman, what model Monster PowerCenter do you have, or what would you recommend?

Chessie, killer system. It's amazing how some good power will really make those Polks sing.

butchgo, I've run across your posts about your XDC2 from various searches. How in the world would I test to see if there's standing DC on the line? I'm assuming that all of my hum is coming from ground loops, which I'm slowly isolating. Can you check for DC on the line with just a multimeter?

Thanks everyone for all the replies.