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
@millercarbon.

”Engineer you say…”.

I was trained as a scientist. I got out of school and needed to get a job to buy a suit and get money to move and look for a job in my profession. I was working at a start up company as a manual laborer. When equipment would break I would run over and fix it and recommend how to change it… I was board to death. The owners saw this and hired me to architect and build a prototype of a new system. I am not a stereotypical engineer… I know I have worked with hundreds of them at corporations like Texas Instruments, Sharp Corp… and others. A good way to become frustrated at getting anything done… they have to re-invent everything and make it perfect. Scream 🙀!


I worker at Burr-Brown Corp for 15 years. Don’t know if you recognize the name.. DACs, op amps, and ADCs used in high end audio. Yes, with the exception of one of them, they simply don’t believe in a difference in sound possible or their circuit could sound different… and as a consequence refuse to hear it.


The scientist in you saves you then. Being trained in inquiry you know how to study things. That one thing all by itself was worth all the years of schooling. 
@millercarbon .

I couldn’t agree more. Learning how to learn… I have been very lucky.
@millercarbon,

not sure I agree with you on arm boards: they should have maximum dimensional and warp stability relative to the platter and ideally be free of resonance: Brass, acrylic blocks or panzerwood are way preferable to mdf or papp. Listen and learn.
Mass does not solve everything. There is loads of environmental rumble that will transmit through anything. When it gets bad enough buildings fall over. Church bells weight tons and they ring like crazy. The only way to isolate a turntable is to suspend it.