It is ridiculous to think that only speakers are affected by isolation. I have tried countless isolation devices. The Stillpoints solution uses changing vertical vibration into horizontal vibrations which in tern are restricted and turned into heat. Star Sound Tech seeks to get vibrations within components to earth quickly thus undoing the effects of the vibrations.
Both work well with different effects. I have made my choice but you may differ.
I hate the effects of rubber, wood, with the possible exception of iron wood. I also dislike springs, whether actual springs, inner-tubes, like pole magnets, etc. All have a resonant frequency.
There is still the fact that vibrations in the air affect signal cable and speaker cables. Here I suspect my using all High Fidelity Cables with magnets. When an electromagnetic field hits a magnet, it goes off at right angles and thus induces no signal within the cables. Finemet and ferrous beads resist electromagnetic fields but, for me, also have adverse implications.
I have been in audio since 1961 and once thought I was close to realism. In the last five years, I realize that I was no where close. But my sound even a year ago thanks to a handful of brilliant guys has further improved. My quest to be able to think that a reproduced piano in another room is real, still is a quest.