Vibration Problem

Open the box and internally check weak mountings of the mechanizm.
Placing a silicone at mounting joints will improve vibra-proofing better than any-priced cones or tweeks.

Another possibility is that the vibration problems are from a suspended floor. Try moving your cdp/rack in the room corner and see if that helps. All the suggestions given above are to counteract airborne vibrations to the cdp chassis - one that's stationary. They do very little to help if the floor is moving.

Try mass loading the player using the sandbag trick, varying the amount of sand / weight in the bag. As Sugarbrie mentioned, you can always put the sandbag inside of some type of ornamental cloth covering.

As far as the inntertube goes, try sticking it inside of an open top wooden box with cones underneath that box. You can then rest another piece of wood over the top of the innertube and the CD player will sit on top of this. By varying the weight in the sandbag and how much air is in the innertube, you are able to alter the resonant frequency and amount of energy transfer involved. None of this will look out of place and you can use whatever type of cloth and wood that will match your decor. Sean
>

Go to a hardware store and get some Mortite weatherstrip. Place it two layers thick on a flat board and insert it under your cd player, if that does not work try three layers. Make sure the Mortite side is against the bottom of the cd player.

2 3lb.Non magetic Stainless Steel blocks(bought for a few $ locally) polished to a mirror finish on top of my planet does the trick