fyi, I have wood floors on concrete. For my Adona Altair dual rack that comes with adjustable feet, I use a furniture felt pad and a Herbies Giant Fat Glider between the ground and the felt pad. This is for all six columns for the rack. For my speakers which are 170 lbs (Wilson Watt Puppy 8), I use IsoAcoustic Gaia I isolators. I needed 3/8-16 studs for the GAIA 1 Isolators and IsoAcoustic is happy to provide those at no charge. The Gaia 1 isolators have a rubber cup, and "stick" to the wood floor. For speaker placement optimization, I tilt the speakers and slide big thick felt pads under the Gaia and moved them around for weeks until I was satisfied... When satisfied, I just slide the felt pads out. For me, it was between Stack Audio Auva or IsoAcoustic for my speaker isolators. They both have great reviews and I do not know which one is better. In the end, I went with the IsoAcoustic because: I like the way they looked with my Speakers with the lift I was looking for (we stand up at the bar alot); I like the concept of tight coupling to the floor and letting the isolator do all the work; and I got a great deal on new ones from a dealer on Audiomart. Here is a pic.


