The greatest cones ever developed - The Goldmund Cone. I've had them in my system for 15 years and they have never varied: they control vibrations and clean up the sound of any piece they have been placed under. I first bought them to put under my large Mirage M-1 speakers. I soon learned that they work under anything - CD players, pre-amps, and especially amplifiers. Try them, you'll love them - especially at this price. There are some scuffs and scratches on these but who cares? You don't see them, you just hear them. Price $195 per set of three (3). Buyer to pay PayPal and Shipping, which should be cheap.