Wood blocks underneath components?? snake oil?

Hi Tom, I agree with your thought. As the world turns so to speak, so do we. And we go 'round in circles, a wheel within a wheel. Perhaps if we could design a platform supported by magnetic forces in opposition might might we then have the perfect isolation devise. Oh well we can dream on and fiddle around. Its fun if we keep it that.

There are so called "magnetic isolation" tables but that is also bunk. Think of two boards, one above the other with opposing magnets on the corners. Without some type of mechanical connection to contain the sides of the top board, it will shoot off to the side. Also, it's not floating on air like a magic carpet, the magnet below is pushing up just like if the board on top was sitting on some type of foot holding it up. If the magnet below is vibrating that will be passed to the one above.

Remember Newton's first law? The thing is if anything is vibrating, it doesn't matter what it is also vibrating, either parts of itself or whatever it is in contact with. Even at zero G, the vibrating thing is going to vibrate the enclosure it is contained in and the interconnects connecting it to the rest of the system.

The answer is to select quiet, well-designed components that don't vibrate so much in the first place.

Newbee, I agree. I should've been more clear, how about this:

pumice stone

This is porous like miniature concrete blocks.

Rotarius, your explanation makes sense. However in the case of a CDP, the CDP itself has vibrations so you're not just trying to isolate from floorborne vibrations, you're also trying to get rid of vibrations in the CDP itself. Will an isolator/damper like an air bladder be effective when both conponents (shelf and CDP) are vibrating? I don't know.
For some reason something like porous ceramic which is "infinitely" light, "infinitely" rigid, and has "no" resonant mode has some intuitive logic that makes sense to me when used as an interface between two resonant components.
Sorbothane made the bass muddy and slow. Music was less clear. Maybe it's the horizontal motion thing. Using the design calculations from Sorbothane's website, the sorbothane have to be nearly 3/4" thick for optimal isolation/dampening.