Opinions on Glass Shelves


I am thinking about buying a new audio rack. When I tap on the shelf below the shelf on which my turntable sits while the needle is on an LP at rest, I can hear the a slight echo in my speakers.

I’ve looked into various audio racks including some from Billy Bags. The salesperson at Billy Bags told me that their ¾” cracked glass was sound-deadening and would provide excellent sound isolation. To me this is counterintuitive.

Has anyone had any experience with cracked glass from Billy Bags?

Has anyone had any experience with glass shelves in general?
josephdtorres
I have glass shelves in my system and unless I tap pretty hard there is no effect.
Take a look at slate. I believe it to be the ultimate constrained layer material. Sound travels though it slowly, and is actually changed along the way. The downside is its weight, but the payoff is excellent.

Glass reflects sound, and sound travels through granite faster than through water, so I wouldn't choose either of them. They do look nice, and may not actually be detremental.

Then, there is concrete and wood. Depending on the composition, one of them may be decent. Of course, there are the foam composite shelves that are engineered for the task, too.

.
I have a Sound Organization rack with glass shelves. I replaced the top shelf with a custom made Neuance shelf for my TT. The other shelves have 12"x12" sheets of asphalt damping material applied to their bottoms. Not a high end rack by any means, but it works reasonably well.
Cracked glass is a three piece laminate; there is no ringing effect which is the case with regular glass- rap your knuckle on ¾” plate then do the same with cracked glass- it is not just cosmetic- It is acoustically dead.

Billy Bags Designs
Thanks for posting, Jmstogo! Can you give us a brief description of what the laminates look like and/or the process to make these shelves? I'm not looking for secrets, just trying to get a mental image of these shelves.