Air Bladder Isolation, Cheap

I have heard some use the inflatable doughnut cushions sold at drug stores for people with hemeriods or other unfortunate problems. Given the anal retentive tendencies of many hobbyists, this may be more appropriate for some. A layer of bubble-rap between shelves can be interesting to experiment with, and if it doesnt help sonics, you can calm yourself popping the bubbles. I doe use a cement stepping stone from Home Depot under my sub and one on top. Seems to tighten things up.

Inscrutable-I highly recommend using a Target wall mount shelf. I sold my suspended turntable to a friend and when we set it up on the rack where his old turntable sat you couldnt walk past wihtout major skipping. 15min. later the wall shelf was up and all was well again. I knew it would fix the problem but was amazed when my friend stompted and jumped up and down like (as) a mad man with no ill effects. Having used my shelf for years I am covinced it is the oly way to go if your floor is not a slab. The walls trasmit less vibration than the floor and spikes isolate the shelf. Mount it close to a corner or door frame if possible.