I use the following Mapleshade "maple platform with isoblock suspension" under my VAC Renaissance 70/70 MkIII amplifier, on a bare wood floor. Seems to do the job, as evidenced in part by the absence of any audible response to nearby footfalls:
http://shop.mapleshadestore.com/21-x-19-x-4-Finished-Maple-Platform-With-Isoblock-Suspension/product...
Regards,
-- Al
http://shop.mapleshadestore.com/21-x-19-x-4-Finished-Maple-Platform-With-Isoblock-Suspension/product...
Regards,
-- Al