I'm putting together a theater system for a buddy which includes 2 x LSI9s and 1 x LSIC
He needs solid stands for these - and i've had a few designs we were thinking of - then he thought about just making the stands out of concrete (a lot of stuff in his home is made from concrte - kind of a specialty of his).
So my question is this - would he lose any sound quality using concrete speaker stands? If he uses them, does he need some kind of feet for them? What do you guys think?