Isolation for a table for floors with movement

Another approach that I have read about but not tried is to isolate the speakers from the floor so the vibration never gets to it. Unfortunately the article that described how it was done was rendered illegible by recent water damage in my basement and I have not yet replaced it. It looked practical but not simple and I would resort to it only if simpler methods proved inadequate.

I would suggest looking into the Townsend Seismic sink. The older ones used an air bladder, and the new ones use springs. Both are the most effective platforms I have tried.

Since you say your floors are a problem area, my first thought is I would not couple to floors with brass and spikes. Instead, go the isolation approach, either with viscoelastic type material (Sorbothane is a brand name) or -- in my opinion overkill -- air suspensions, springs, shock absorbers... Every one of these products are geared towards an ideal weight, and with that weight, their harmonic frequency will drop to the lowest (between 3-5Hz or better) so that it becomes inaudible.

I would look into solving some of your floor issiues first.....Pick up some screw jacks, the kind to support floor joists.......your local lumber yard or home depot will have them. Just get the size you need and place them on some sort of concrete pad or stepping stones. locate them where your gear is and you will be amazed for very little money spent. I had the same issue and tried many isolation devises, non of them did much except drain my check book.......the jacks solved almost all the floor problems and attatching L brackets to the stand then securing the bracket into a wall stud helps too......I see no other way except a wall mount but you say that is out.

Jsawhitlock is correct but you may want to use 2 jacks with a 4x6 spanning across the jacks and supporting all the joists which are under your system. Depending on the span you might use a 3rd jack in the middle. For a footer use a 4x8x16" solid cap block. Of course this is with the assumption that your system is on a 1st floor with access to the crawlspace or basement below.