CD player vibration control ..................

Rigid objects do not provide any vibration isolation or damping. They merely change the natural frequency of the system they are used in and it could still fall within the audio band (usually does). Look at some *real* isolators online, they usually employ springs or elastomers.

Gosthouse, the real trick is to determine how much your isolator has to compress for a particular weight it carries and you have to prevent horizontal front-to-back or side-to-side movement. An enclosed air bladder may provide real amd measurable vibration control. All I can say to everyone on here is make sure the seller supplies you with measured data to substantiate the claims as it can be done easily and without a lot of expense.

Islandear, I totally agree with what you are saying, you cannot quantify the sonic changes with these products. However, you can very easily quantify if X product can indeed damp or dissipate vibration. You may not like the sonic result of a properly damped component. However, if a manufacturer tells you his product kills unwanted vibration, I want to know how. Where is the proof that a brass cone can "drain" vibration? That would certainly be very interesting to me.