Babalu,

I just ordered an HSU STF-3 from here...a Canadian retailer.

http://www.homedigitalav.com

I have the sub in the basement; it's on a carpeted floor though. I know HSU recommends throwing a rug at least under the sub for wood floors.

BTW, the STF-3 is a monster. I've heard you guys here talk about shaking and vibrating walls. I now know what you mean...this thing literally shakes the room. I now have squeaks and rattles that I never knew existed - have to fix. This is my first sub...didn't know what I was missing. It's GREAT!

Joe