I've use the Symposium Svelte and Super shelves and find them very effective under speakers, amps, and CD/turntables.
However, most of my components rest on Symposium Rollerblocks because they're just as effective and more flexible. The double-stack configuration with tungsten (or Superball) is particularly good for CD players and turntables. The result is significantly more detail throughout and less background noise and hash.
Keep in mind that the Ultra shelf is 3.5" thick, and the stock sizes might not fit your rack or CD player. The other advantage is that the Rollerblocks can handle footfalls. My VPI turntable never skips when someone walks on my springy hardwood floor.
Symposium is widely available so you can try the shelves or Rollerblocks and recoup your cost if you don't like them.
BTW, I was quite surprised that my power conditioner really benefitted from good isolation. It seems that even a "passive" conditioner (eg. Nordost Thor) needs vibration dissipation.
However, most of my components rest on Symposium Rollerblocks because they're just as effective and more flexible. The double-stack configuration with tungsten (or Superball) is particularly good for CD players and turntables. The result is significantly more detail throughout and less background noise and hash.
Keep in mind that the Ultra shelf is 3.5" thick, and the stock sizes might not fit your rack or CD player. The other advantage is that the Rollerblocks can handle footfalls. My VPI turntable never skips when someone walks on my springy hardwood floor.
Symposium is widely available so you can try the shelves or Rollerblocks and recoup your cost if you don't like them.
BTW, I was quite surprised that my power conditioner really benefitted from good isolation. It seems that even a "passive" conditioner (eg. Nordost Thor) needs vibration dissipation.