Another method is to put a supporting concrete pile under your house directly under the turntable - although I concede this is not always practical. Since the Oracle is sprung, then any additional compliant isolation will cause sonic degradation through creating nodes between the resonant frequencies of the two systems. Another method would be to find where the floor has solid supports, and put the turntable on top of one, or put it on a rigid plank that spans from one to another of the supports.
Isolation for turntables
I'm looking for some ideas on how to keep my turntable on the straight and narrow. My Oracle Delphi IV/SME345/Grado Reference is not in the ideal environment. I had a custom oak stand built for my gear and certainly blends well with the decor. Trouble is, my listening room has an oak strip hardwood floor, slightest footsteps makes the cartridge jump. Ouch. I bought a Townshend Seismic Sink HD and slipped it under the 'table, no real improvement. So, I'm going to sell the Sink and get something else, question is, what can I use to keep my rig from bouncing around? Thanks in advance for any and all suggestions, Jeff