Decoupling Speakers

Next week, I plan to experiment with decoupling my speakers, which sit over a carpeted floor, over a concrete slab, over sandy soil.  The speakers are Aerial LR5s (105 pounds each), that are secured (bolted) to heavy (70 pounds each), steel, sand-filled, Sound Anchor Signature stands, which are currently coupled to the concrete floor using SA’s spikes.  I do not want to decouple the speaker cabinets from the stands since the stands act as outriggers for additional stability.  Plus, I believe the weight of the sand filled stands will help resist woofer movements and provide damping.  Therefore, my plan is to decouple the stands from the concrete floor.  Obviously, whatever I use will sit directly on the carpet.

I have sets of Herbie’s Giant Fat Gliders on the way but I would also be interested to hear from any who have heard the A/V Roomservice EVP vibration isolation pads used in a similar configuration to decouple speakers.  Below is a link to a discussion On the EVPs vs. Herbie’s but the comparison was to Tenderfeet, which I would not expect to perform anywhere near as well as the large DB Neutralizer pads in the Giant Fat Gliders.  I would like to compare the gliders with the EVP pads but the large pads I need would be $105 each x 8.  I know many like ISO Acoustics Gaia products but I want to keep a low profile under the SA stands so I have ruled those out, at least for now.

https://www.audioshark.org/vibration-isolation-devices-26/data-analysis-v-roomservice-evp-vibration-isolation-pad-17886.html