Do glass shelves affect sound Quality?


I have a TV cabinet with glass shelves that houses my hifi components. I'm wondering if the glass shelves could affect the sound quality of my components. I have a Classe pre/pro and 5 channel amp, Oppo 95 player and the Olive 04HD.
128x128ronrags
like some of the other members I use a bit of glass under my CDP & have not had any issues with the sound for the last 10 years.
I tried granite & marble - both made the sound harsh. I know why. I also tried a teak wooden shelf & that made the sound too rich (bass heavy). So, glass was the most neutral believe it or not!
And, the glass is sitting on rollerballs & is not damped on the underside at all. Howzzat, eh?? Goes against the grain of thought......

Just my 22 dollars solution to the glass issue . I bought 5 plain cork tiles at Home Depot( $15) and a jar of wood glue ($8) ,brush the glue on the tiles , clamped them together for 24 hours, put a finishing blade in my jigsaw, and cut 2 x 2 " squares , placed that on my 1/2 " glass shelves, and I think it made a very small difference in the trebles. I think?


Glass is the worst for sound and wood is soft i use Symposium under all my components. 

The Mana employs glass shelves and the more shelves the better the sound. There is some guy somewhere with an 8 shelf Mana. Say, isn’t glass a liquid?
Old automotive engineers used to bury engine blocks to "cure" them. When asked why, they said metal is just a slow moving liquid.