Granite under wood for better isolation?

I have had good results using different types of isolation materials in combination. In my system, I use various combinations of maple, carbon fiber, sand, and viscoelastic materials, sometimes combining as many as three different materials under the same component. I have found that combining materials offers a significant improvement over each material used individually. I have not, however, experimented with granite, so I cannot comment on the likely results of combining it with maple. But I think your experiment is worthwhile. Good luck.

try just the maple and place Vibrapods, one at each corner, as footers. VPods are rated by weight loading; add the total and divide by four, then size appropriately.

Or try the granite with cones below the maple / atop the stone. Vibrapods under the granite atop the rack shelf.

A sheet of pink bubble wrap is another good iso material. The pink is antistatic and heavy duty so air will not leak out.

It appears what you are actually doing is coupling the materials, rather then isolating them. Try the vibrapod suggestion, very inexpensive. However, if you need the ultimate solution, best to get base like they put electron microscopes on. They can be had in the used market for about $20K. I know of a guy who did the latter for his $200K table.

I went the granite route under my table as well, and then discovered what a mistake it was. Granite rings at fairly high frequencies so you can hear the smearing that results. But it looks wonderful, Dakota Mahogany granite.

I also tried a hard maple shelf before the granite, which was also a mistake with my table. The wood tended to soften attacks so the wood smears in another way.

Best solution I have found so far for my stand and table is to use Stillpoints between the granite and table plinth. The vibrapods would probably work also, but I would suggest listening for any softening in the bass and in attack. I'm not really sure how much they allow movement since I have not used them. I do hear slight loss of bass slam with the Stillpoints, but I can live with that until I find a better solution.

Best of luck. Don't get discouraged, you may have to try several things until you find something that works well for your equipment and tastes.

I live in Manhattan so I have the benifit of living in a very largehigh rse building 27floors. I live on the 11th and while pondering the best solution to TT isolation. I was in my lobby while waiting for an elevator the Otis repair were working on an out of order elevator. I then reasoned that the shocks at the bottom of the pit were very large industrial springs and according to Otis weighing in at over 1200lbs per spring. Well I can tell you my audiophile juices really perked up and after precurring a pass key to the bottom shaft door. That night I was salivating with the thought that I have finally found the ultimate tweak. So sneakerly I took my TT down and very gingerly placed it on all 4 springs using a large piece of wood in the basement. I centered it and now the larger problem running a long phono cable up to my adcom 565 pre. Well being an audiophile this would never stop me or any. So of course with fleet of foot next day while the TT lay dorment on all 4 springs I ran to my nearest RAT Shack and bought 2400' of copper cable and yes done at last the best isolation system for a TT for next to nothing unless you count the extra long phono cable but I am an audiophile and must do all to get the best out of the system. You are all wondering how it all sounded this new found mass of isolation at the bottom of my buildings elevator shaft. I cued up an lp and with fast of foot ran up 11 floors to just make half the lp and it was a miracle. The soundstage and images were just the best "JAW DROPPING". But everything is not all pretzel's and beer. I had to time the end of each lp and dash out the door and run down 11 flights of stairs open the elevator shaft doors and lift the tonearm flip the lp and start all over again.I reason that this tweak will not only make every TT sound its best but keep all who try it in the best shape of their life.I thank you all and recommend this to all who live in a high-rise building with access to their elevator shaftway.