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.
Vibrapods are perhaps not as good as Equarack speaker mounts but my total bill was about $50 while Equaracks would cost me over $1400.