Speaker shock absorbers

I've a pair of DIY "minitowers" at the crossover design stage and will place them atop stereo subs. While I don't listen at high volumes, absorbing any sub vibrations is a concern. I bought two sorbothane sheets (which cover the entire bases of the towers) from Edmund Scientific for decoupling. Of course the clear plastic protective sheeting on either side of the sorbothane will stay in place so as not to ruin the veneers with "sorboleak". We'll just have to see if it does the trick...

The Equarack footers would be perfect. I'm using them under a large subwoofer to isolate it from the floor and the surrounding electronics. Dramatically effective. Works better than any other homebrew or store bought remedies that I've tried. Gets rid of false resonant information from the sub. Increases real definition and eliminates resonant contamination bleeding through to the electronics. Sounds like this is pretty much what you need.

Maybe my experience can illuminate the question whether to spike or not. During a long audiophile life I have vacillated between spikes or more pliant shock absorbers (SD-feet from Sweden, the Base Platform from Norway and Valhalla Technology from Denmark). All had their advantages, but the main problem was that they made the speakers wobbly and the sound muddy. So I always returned to spikes. So a few weeks ago I by chance discovered Equarack speaker mounts (from the US). I ordered eight of these and put four under each of my Vienna Acoustics Beethoven Concert Grand speakers. Suddenly everything fell into place: natural, smooth, free flowing music but with tight bass and sharp transients. I can`t recommend them highly enough ( I am certainly not paid by the producer to say this!). So this might be the "final solution"! So try them.

Trondf - Have you tried Vibrapods. It is pretty much the same idea (lossy viscoelstic rubber) and very smart design. I have one of them under each corner of my speakers. Compare to spikes sound is cleaner, bass is faster and more even/musical.
Vibrapods are perhaps not as good as Equarack speaker mounts but my total bill was about $50 while Equaracks would cost me over $1400.

Kijanki - No I haven`t tried the Vibrapods. To me they seem to be based on more or less the same principles as the products I have tried before, but then again: I don`t know too much about them. Anyhow, they seem to work for you and that is the main thing. As to the cost of the Equarack speaker mounts: 8 mounts with viscoelastic pellets set me back around 6-700 US dollars. For me they combine two things: stability and decoupling/isolation. But the real proof is in the pudding; i.e. listening. What sounds good to you is good, isn`t it?