I lifted my Silverline Preludes up about 4 inches on butcher blocks (tweeter level with my seated head…and there's nothing like seated head) and put Vibrapods under the "outriggers" on top of the blocks…made the Preludes sound even better, zero speaker resonance goes into the wood floors, or comes up into the speaker from my sub. I think Spikers are simply misguided sheep (although I do admit to having some old "high end" cones under my preamp as it looks cool, I admit sheepishly).