I've been trying to remedy the cause of some boominess in my system which I don't think is the fault of my equipment. I happened upon an article the other day which was discussing the subject of vibrations and decided to pursue that a little. My listening room is a second story spare bedroom above a garage. I have fairly heavy floor standing speakers and wooden equipment racks. My main thought was the speakers being on a second story floor on what is probably a surface very susceptible to vibrations. I have been considering buying some cement blocks to place them on with some dampening type material attached, but in the meantime I had a bunch of those thick mouse pads lying around and decided to experiment with placing them under some of my components. I had enough to place them under my CD player and my 2 external amps I use for the fronts. This seems to have made a tremendous difference so far....much less boominess. I'm hoping the blocks for the speakers will help even further. I know this isn't anything new but thought I'd mention it for any novices out there like me who may be experiencing something similar, and for you experts out there to comment on concerning possible other negative side effects this might create. Thanks!