Isolation for a table for floors with movement

Lots of info Thx, here's a little more info. It's in a living rm set-up.

When I had this house built over 11 years ago now I never intended on having a table upstairs. The floor construction consists of 2 layers of 3/4" ply on top of resilient joists. The top layer of ply is also screwed into the joists and then every other 5". The floor isn't that bad but when we are talking about movement there most defiantly is such and adding a table I want to address this properly so not to have any issues.

Underneath is a basement with 9ft finished ceiling, open concept so I can't do any post etc.

When I went to the Minus K web site and viewed the video of the glass of water and coin standing on edge looks pretty impressive. I like the ideal of what one member did by placing the SRA platform on top.

What are your thoughts if I just use one of my current stands which is a ridget design and then place a 1-2 inch pce of slate on top, then place one of these vibration platforms on top of it and then for example lets say the SRA platform specifically designed for my table and finally my table on top?

Let me know what you think

If the floor is the problem, the wall is the solution. Wall mount may not be that tempting to most audiophiles, but it a most suitable and technically an excellent solution which eliminates or at least minimizes most vibrations much better than any floor-bound rack or stand.

Dev,

thanks for the details on your set-up.

from what you say it sounds like the floor is the way it's going to be. the only other 'floor' idea is to get something large, dense and heavy and try it under your rack. it's possible it might 'ground' the floor sufficiently to reduce flex. but it also might make things worse.

so what you can do is to address sources of resonance in the room which will transmit feedback, which is primarily your speakers. there are a number of de-coupling footers or platforms which can somewhat isolate the speaker feedback from the floor. right now you likely use spikes into the subfloor thru your carpet for the speakers.....which effectively transmit the speaker feedback.....you need to go the opposite direction and decouple somehow. then listen. it might be that spikes into the floor are best, but not likely while playing Lps.

then i think you are on the right track with the various multi layers of isolation you have mentioned. you might speak to TW Acoustic and see what they recommend for that tt in your situation.

good luck.

If the wall is out - how about the ceiling ? Is there a possibility to mount a kind of hanging suspension to the ceiling - 4 points. Each point would only have to hold about 25 - 30 lbs - most larger modern ceiling light devices are in that weight range. It would - in any case - be the most smart, inexpensive and effective isolation from floor-transmitted vibration. And sure can be an eye-catcher....

The stands to own HRS, Stillpoints, Finite Element - a used one on gon now. If you are going for less costly approach Arcici makes two satnds a Reference and Standard that very excellent. Excluding the HRS which is IMHO the best and most expensive stand out there. If you buy an HRS you'll never need to replace it.

For stands others than the HRS, I like adding a 1" slate or a SRA platform to the top on the stand for additional mass loading underneath your TW Acustic Raven. Congratulations, a super table!