I have not tested EVP’s under the amps. They are available in Light, Medium, and Heavy densities, in sizes of 2” to 4”. The website has a calculator for recommendations by weight. 100#’s call for 5 of the 2” Heavy or 3-5 of the 4” Heavy ones. All are available with Rubber or Felt top and bottom faces. I purchased Felt types. There is a 30 day grace period for return.
My amps are not as heavy, but with 4-way active speakers, I have 8-channels of amplification. I had gone with the Iso-Cups with Black balls with Iso-Cups on top of a metal with isolation layer under them. The systems sit on granite slabs with Herbie’s spiking system under on carpet. I have had for several years. I experimented with two of the 2-channel amps feeding bass modules and lower mid drivers before getting more. My impressions at the time was the Iso-Cup system improved bass definition perception. One caution however—the amps can be moved by rolling on the balls. I had treated with blue tacking material to give more grip. The material can transfer to the bottom of the amp and some marking from pressure of the round balls and this material can transfer.
I have not tested the Daedalus DID’s under any of the amps to date.