I had the same problem with my 3 VPI tables (I no longer have them). I tried everything under the sun and spent lots of cash on maple platforms, granite, special feet, Target shelf bolted to wall, nothing worked. The KAB rumble filter which goes in either a tape loop or between pre and power amp solved the problem It cost 179.00. It uses all audiophile grade parts inside and there is no loss of bass or any frequency's. I have had many different people over the house who could not hear a difference as I didn't either.
Everyone will tell you it is a band aid approach but it works and totally solves the problem. My new Technics SL1200G does not have that problem, not sure why.
Everyone will tell you it is a band aid approach but it works and totally solves the problem. My new Technics SL1200G does not have that problem, not sure why.