ronboco,
actually you're wrong on that one there is a video from the owner of the company showing that when you stamp on concrete you get just as much vibration coming through the floor just at a different frequency then from wood so you would benefit just as much, I was shocked when he stamped on the floor and the little seismographs that were on the speakers started jumping up and down like crazy with the needle I didn't think concrete would transmit anything so I think you should give them a try like I said if you don't like them you can send them back and they give you your money back no one has ever sent a pair back yet.