Well, I have been living with my new SRA iso bases for a few days now and m impressions are as follows.
I liken the sound to a jazz band that has been together for so long that each member knows exactly what the others are about to do next, taking on a very "tight" sound. That is what the iso bases that are under my Cortese and Berning amp sound like. They "tighten" up the music giving bass a very powerful, but controlled sound. Mid-range has a "you are there" feel to it. Vocalists seem to be right in the room with you. Highs sparkle, but are not bright. The sound takes on a more "live" feel to it. A couple of things that I really like is that the soundstage on most recordings seems wider (far beyond the speakers). Depth also improves on some recordings. I have a percussion cd by an artist named Mino Cinelu. This is a great reference cd that I use a lot. With the iso bases I was amazed at the power that the percussion took on. You could not only get a feel for the size of the drums Mino is hitting, but you can get a good idea of the size of the room that the recording took place in. That is really cool! I could go on and on, but I am sure that you get the idea that I love these bases. I highly recommend them for use under the Suprateks. I don't pretend to know how they work, but they DO work. I hope to isolate all of my equipment with the VR3 bases.