Adona equipment racks are made with granite shelves which are then bonded to an MDF layer with an elastomer layer in between. It addresses the ringing that you mention MC. I'm sure that this could be added to any granite slab.
Granite Bases for Vandersteen speakers
I had granite bases made made for my Quatros on Richards recommendation they weigh 120 lbs
The bases tightened up the bass mover it down even lower ,focused the midrange and add more depth to the soundstage you can check out the picture in virtual systems
Enjoy the Music
Tom
The bases tightened up the bass mover it down even lower ,focused the midrange and add more depth to the soundstage you can check out the picture in virtual systems
Enjoy the Music
Tom