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How to isolate turntable from footstep shake or vibration

Even while the Oracle turnable that I use has a built-in springs suspension by design there is a low or even sub-low frequency boom every time someone walks in a room. This becomes really bad with the subwoofer’s volume set high as the low frequency footsteps make straight to subwoofer where they are amplified shaking everything around. It seems the cartridge is picking up the footsteps very efficiently as even a lightest foot down becomes audioable. What can be done to attempt to isolate the turntable from the low frequency vibrations? Interesting, that the lower the volume of the subwoofer, the less the footstep shake is evident and with the subwoofer turned off it is a barely a problem at all. 
esputnix

Showing 2 responses by mglik

mglik
913 posts
 
Great bargain in Audio-Silent Running Audio (SRA) VR platform.
Think they are new $1500 built for your TT.
When I installed mine, all of a sudden, my Garrard 301 was able to preform as designed. A $10K TT turned into a $20K+ TT.
No exaggeration. I was floored and bought another for my preamp.
mglik
913 posts
 
I questioned the need for a SRA platform on my preamp and was assured by several that it was absolutely necessary. And when I asked if I also needed Stillpoints, I was definitively told that using them also would defeat the function of the platform. That it was designed for the stock rubber feet.
SRA has a military division which makes, among other things, vibration treatment for nuclear submarines. Thus, the Ohio and Virginia Class names for their platforms.
And about my preamp, if an electron microscope uses a vibration devise, why not a preamp?
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