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
@lewm , I am very simple minded Lou.Insted of buying very elaborate isolation plateforms I would prefer buying equipment that is not affected by the minimal amount of vibration present in a sturdy cabinet. I find it interesting that I see systems with elaborate platforms for the electronics and a turntable that sits on simple feet. I get a Sota mostly because it has a dynamite suspension and is impervious to anything happening around it. The same can be said of several other turntables but not the majority and it is very hard trying to get the message through that heavy plinths do not qualify as a suspension. Turntables are different because it is their job to "measure" vibration. No other component does this and is near as sensitive in this regard. Maybe some tube equipment is susceptible. You and Ralph would be far more knowledgeable on that subject than I am. I only have one tubed unit. But, I have a hard time believing and piece of electronic equipment would be as sensitive as a turntable.  
Sadly for those who love them as one of the best sounding small signal triodes ever built, the 6SN7 is one of the culprits for being especially microphonic.
Actually @lewm IME the 6SL7 is the more problematic tube compared to a 6SN7.


@mijostyn Just so you know, the tubes in your ARC have to be hand-picked for low microphonics- every tube phono section manufacturer in the world hand-picks their tubes.


Electronics are indeed not as sensitive as a turntable. But they can be sensitive nevertheless which is why many people put platforms beneath their preamps as well as their turntables.

I get a Sota mostly because it has a dynamite suspension and is impervious to anything happening around it.
I had the Sota Cosmos for the same reason. However, I was friends with the guy that ran Sound Anchors (since retired; Sound Anchors has a new owner) and he helped me out with a custom stand. Immediately the Cosmos sounded better. Then I got an improved platform for the turntable and immediately the Cosmos sounded better. The thing about suspension and anti-vibration systems is that they work nicely together. We offer a damping package for the chassis of our preamps as an option; when a preamp with that package is placed in a good anti-vibration platform, the effect of doing so is more profound than if the preamp has no damping package. With analog I don’t think we’ve found how much you can do to improve its sound, on account of the operation being based on microscopic effects!



Use, 6SL7 is even more microphonic than 6SN7. But not as irreplaceable if ultimate sonics  are the goal. Gain notwithstanding.
Many problems like yours have been fixed by wedging an appropriate sized piece of lumber between the wall and the turntable support.  Easy to try...bet it works for you