Chinese Limestone in the Cinema

I'm still working in the cinema to improve stuff as well. My speakers stand on needles to get clearer sound, but we put thick carpet in the cinema and those needles didn't really do their job any more, since they just disappeared in the carpet resulting in the speakers touching the round anyway. So I started looking for some nice solid and heavy stuff to put under them. Finally we found a nice solution in these Chinese limestone tiles. We found them at a garden specialist. I can be psychological of course, but I'm under the impression that it sounds way better already :)