I agree from experience--granite resonates if speakers and subs are close to your components. I still have my amps and CDP on granite slabs but have solved the problem with footers I have made. If you want the look of granite, just have some Corian pieces made---much more inert.
Granite and digital..
I'm thinking about making a homemade isolation platform for my cd player.What I was going to make whould be 2 slabs of 2 1/2" thick pieces of granite separated by a air bladder of some kind..There a lot of different isolation shells on the market but wasn't sure if granite is good for the over all sound.Any comments.