I've gone from Sobothane to brass cones to (finally) Myrtle wood blocks (with a thin layer of Sorbothane on the bottom between the block and the shelf). All under the amp.
Anybody still using soft rubber isolation devices?
I switched from things like sorbothane and Vibrapods to brass cones, and a metal equipment rack a few years ago. Yesterday I was talking to a friend who said in passing that most people still use soft rubber type of footers. I was surprised and wondered if that was true???