Do glass shelves affect sound Quality?

Herbie's stuff is very effective. Tenderfeet under my TT, various ISP-cups and blls under my amp & phono stage and a way excellent mat on my TT. I've been using Steve's isolation stuff for years.

MT10425, Thanks for your reply. I'll give the tenderfeet a try.

Does anyone have a response on the supersonic stabilizers?

yes glass is a very difficult substance to work with. I don' like po;ished rock slabs for the same reflective difraction prone properties.
Wood.Rubber and dense metals seem to work great for me

For my Sound Organisation rack with glass shelves I used two strips of 1" x 8" Black Hole Pad adhesive dampening material on the surface of the glass beneath each shelf. This helps to dampen any ringing.

If the glass sits on a supporting frame the use of a relatively soft supporting material can also help. Herbie's Audio Lab Grungebuster Dots would be a good choice for this application.

The Tenderfeet recommended is a good choice to interface between the equipment and glass shelf. I've had very good results with these and the Iso-Cups and balls noted above. The Supersonic Stabilizers are usually used for chassis vibration. I don't have enough experience with them to make a firm recommendation but they may be helpful to you.

I'd give Steve's recommendations a try. Fortunately Herbie's Audio Lab has a 90-day Trial Period on all products for full refund or exchange for a different product so you'll will not be stuck with something that does not provide a satisfying solution.

Just say no to glass. Less expensive and better sound management shelves are available. If you have glass, a very inexpensive tweak is to line the bottoms of the shelve surface with heavy felt, which is available in many colors, including black, the audiophile choice.