Posted by a reviewer on Amazon

There was an indication in the writeup that they were ok for turntable isolatingeven sitting on a flat granite surface there was a tendency for them to lean not sit exactly upright and were thus difficult to positionhad i removed any of the springs which is suggested by the manufacturer that may have be even worse the fact is thatthey resonate a little and the turntable and stylus become unstablehow they would be with a speaker i dont know but cant see the point of using them for speakersi can understand the principlebut they need to be half if not a quarter of the height unless the turntable was the weight of a substantial speaker the best word i can think of is wobble