So......what do you use under your speakers?

Nobrainer, it seems to me that you really need to try solutions to your problem rather than following other's advice. If possible, I would include the StillPoints Ultra Fives perhaps on their old Component Stands and the Star Sound Apprentices. These have philosophies that are quite opposite.

Geoffkait, Yes it was the Halcyonics which electronically cancelled the vibrations sensed but only up to about 300 Hz. The StillPoints standoffs also work quite well.

I can only imagine what music reproduction would be like were there no vibrations affecting the signal path, including those originating in it other than music sources.

I, too, had Symposiums and like about twenty or so other isolation devices, sold them or put them in a box in my storage room. There has been much tinkering with isolation devices made of many mixes of vibration absorbing materials. Some even work under some circumstances. Most are better than putting a component on the top of a table or cabinet.

I still remember buying some of Steve McCormack's TipToes that often did help. It has been a slippery slope since then. Unfortunately, everything has a resonant frequency including resonance dampening materials. You get to pick your poison. Dampening helps some until you get close to the resonant frequency. In short, if you like it, use it.

Geoffkait, canceling is a loosely used word. Reducing them at certain frequencies is the reality. Isolation is essential for the "magic" sound stage that I am hearing, but I realize that it is only improved isolation.

Geoffkait, yeah a pump.

Dayglow, this is not an election. I have a box full of tiptoes of various material and mixtures of them, string suspension platforms, various pucks, including ones that are solid carbon, etc.

Geoffkait, yeah a pump.

Dayglow, this is not an election. I have a box full of tiptoes of various material and mixtures of them, string suspension platforms, various pucks, including ones that are solid carbon, like magnet pucks, springs with various dampers, etc.
None of these are anymore than shots in the dark.