Like Fmpnd, I have over the years been through a series of pucks, feet, discs, stands and racks, all of which were in the end less than fully satisfying. I have finally found something which does no harm and in many instances provides a significant improvement in the sound, the Finite Elemente series of feet, amp stands and equipment racks, particularly the Pagode Master Reference series used with cerabases. My initial purchase was the equipment rack which worked so well that I bought two amp stands and then began adding cerabases. A well engineered approach that works. I have recently heard an active isolation base, the minus k at the infamous Professor Luttbeg's home and it was a revelation under CD players, but incredibly expensive.