Somebody explain this to me. You have your speakers, amps, everything on these bearings, vibropods, sandbags,concrete, and other esoteric whatevers. Now where is the isolation? Are the resonances from the sounds put out by your speakers airborne? How do you keep that from your components? You can't. Better to couple everything. Send all those resonances to the floor. Vibration can't be stopped. There are many good vibrations. Why would you want to absorb them? Sand, lead, the like, don't differentiate between the two. This new speaker support system I just purchased from Star Sound Technologies is based on this principle of resonance transference. I am still in awe of what I hear from my speakers. I am a tough sell, with these golden ears of mine. Can you relate? More about these stands in a bit. Back to you with more.. Got's to go and run. Be gentle with me.