NO RUBBER! You do not want to absorb anything. Transference is the deal. Getting you guys to think along this new science of resonance transference is going to take some work. Audiopoints will deliver. Now if you're into something a bit more costly, but amazing, talk to Robert about their new speaker support systems. I have owned mine for a week and, still, cannot believe the difference it's making in my system. I cannot overstate the importance of a good speaker stand. It is as important a component as the others. I'm going to do a little review about these stands, soon. Nix the blue tak. ( I know everyone uses this stuff. Another resonance absorber-) Anything that absorbs sound is a negative. Your stands are probably filled with sand or some dampening stuff. Right? Again, no good. I know everyone and their mother does it, but you want those resonances to go to the floor. That's where they belong.