....and I don't want just normal 2x4 construction in our basement. I'm going to have to close off some of it for the HT. I guess I don't want the basic 2x4 construction for sound deadening. I want something that's easier. So I did some poking around and found these: www.insulock.com I guess they use them for soundwalls because the foam they're made of deadens sound pretty well. The plant that makes them is here in town so I'm going to take a look early next week. These things snap together like legos from what I understand. I'm not sure how they'll work for my application, but I intend to get my questions answered when I'm down there.