I have the Townshend Seismic Isolation platform, usually used under turntables, CD players or electronics. I find it to be extremely effective in all ways, but particularly - in symphonic music - in separating out musical lines from each other and making a presentation more coherent (30 instruments, all going at once, can produce a "blare" of sound. The sound tends to "blur" just a little. Flutes and piccolos were not easy to follow, never mind the louder instruments closer to the microphone).
I took it to a friend's house once, just for fun and we played several records. HE was the one who picked up on how in, "I Am a Rock" on a Simon and Garfunkel album, the first time we played it (placed under his turntable), how good it sounded, compared to his (non-audiophile) rack. Then I adjusted the Nordost isolation feet under his (inexpensive) integrated amp, played it again (the whole experiment was using a turntable) and suddenly we could quite clearly hear Paul Simon's very nasal voice.
That fascinated me, so I looked at the setup again. The Springs on the isolation pods were not completely vertically top to bottom. I then straightened the isolation pod springs to be completely vertical (they can "slide" a bit sidewards - as springs can do - so that, instead of the springs being in a proper 12 noon to 6 pm completely vertical position, it looks as if the spring part on the bottom part of the isolation platform (sitting directly on the shelf) is at a 1 pm - 7 pm angle. The difference was rather surprising: as he put it, "I can hear the air around Paul Simon, (which means the recording booth or wherever it was he was singing in)." I've found the same thing at home, and I don't care too much about the "technology" involved, although I understand the principles of the platform (killing floor borne vibrations as well as airborne vibrations). I use my ears, which know what music sounds like in symphony halls and (well, 40 years ago, small cabarets and clubs, which is to say "not miked"). Pretty damned effective!