I have had excellent luck with the Machina Dynamica Nimbus isolation base which uses a Firestone air shock as the primary isolation device. The air shock is gravity loaded with 30# of dead weight and the pressure set at 28-30#. Based on my experience with the Arcici airhead, I think that Arcici's approach is rather simplistic and prone to variable results. I find it to be little better than an inner tube (which is exactly what the Arcici is-three or four tractor tire inner tubes in a nice box). If your decide to try this approach, experiment with inflation (less is often better than more) and with mass loading. If your cd player is light, try adding weight to get the total to 30# or more. Good luck.
