Because my Clearaudio Ref TT does not have a suspension, and that it sits atop a standard sofa table which sits on a concrete basement floor, even moderate foot traffic near this caused problems which were amplified to the speakers.
I looked into the Vibraplane which was prohibitively expensive, considered Walker Valid points and a number of other less expensive isolation tables such as those from Silent Running. Everything was at least $300 and I was not convinced they would resolve my problem.
During an internet search, I came across a DIY project where a grid of tennis balls was used to float a platform for which a TT would be placed. The main difference I made was that I used racquetteballs in a 6x6 grid within a 1" high oak frame. I then placed an 18x18x3 butcher block cutting board (25 lbs) on this. Unfortunately the custom plexiglass cover for the TT was 19x19 so I had to attach a 1" wood strip on the left/right sides of the cutting board using corner brackets to support the plexiglass cover. Total cost of the project was $160 which took about 2 hours....not counting drying time of stain and varnish of the oak frame.
I can now jump on the floor next to the table and there's no sonic effect at all. I can also hit the sofa table very hard and again no effect. This would have been a disaster at high volumes before. It only goes to show what can be done for far far less money.
If anyone is interested, I can send pictures of the setup.
