I don't normally change my opinion on something I've posted, but in the case of these "Mega" feet, I've been left with no choice: while four of them are supposedly designed to be used with comonents weighing up to 80 pounds, the 65 pounds of my Adcom amp have proven too much for these feet. They collapsed completely, resulting in the amp's stock rubber feet supporting the amp. The Pangea feet look like squashed, black mushrooms, stuck to the bottom of the amp.

The Vibracones I had been using worked, but the stainless steel balls collapsed inside the cones, though not completely, and so I've resumed using them until I find an alternative. In the meantime, I'd strongly suggest against using these feet under anything weighing much more than 40 pounds.

I've had the mega feet since Father's Day, and only recently noticed that the amp was no longer being supported by them. I've had the Vibracones under the amp now for about six days, and the mega feet, which are still stuck to the bottom of the amp, haven't yet resumed their original shape.

Too bad.