Years ago I read about glass and similar materials
as they apply to vibration control. I have had excellent
results with pieces I have bought from Prism Research Glass, Inc.
in Raleigh N.C.
I use the sixteenth inch thickness of Quartz glass discs
in conjunction with vibration control pieces, such as Symposium,
BDR, and Aurio. I place the discs on both sides of these pieces,
making a sandwich of them, so that the Quartz glass has contact with the
bottom of the speaker or electronic piece and the shelf.
It does change the sound, for the better, IMO.
I also experimented with DIY HFTs, and found that, by breaking
the discs into smaller triangular pieces (the company does not make
them smaller than 2" discs, I think) they provide "support" for the HFT.
I roll a thin bead of BLU Tack and affix it to the open side
of the HFT. Then I attach it to the Quartz glass, and affix the
Quartz glass to the wall, for example. On the back of the
Quartz piece is either a piece of double sided Scotch tape or
a small circle of Blu Tack. I can hear an improvement this way, versus
simply placing the HFT directly to the wall. I think the Quartz glass might
be "energizing" the movement of air?
