Quatro Wood best feet

Yes they stock them
i have them under both my Treo and 7 with hardwood floors
jaclyn in parts can get them out to you

Great idea Tomic, thanks so much. 
Granite does not make Vandersteen speakers sound brighter. Better bass, sound staging and more focused. So excited to get them in after talking to Richard and friends about them. :) 

One thing to understand is that most all Vandersteen feature cabinet within a cabinet construction WITH a proprietary constrained layer damping between cabinets, so the cabinet is not vibrating a lot.
RV is data driven and the 7 cabinet is his reference which adds an autoclave cured carbon fiber wrap to the above mentioned construction- the Treo is remarkably inert and weighs 85#, Quattro even more massively constructed!
try them out with factory spikes, shoes
try them out
get a baseline
then try other products
hard to beat the Amazon return policy

where I can get a pair 2 inch thick black granite with reasonable price in bay area? I think I should still try it as RV advised.

I steered you wrong
service via Factory, parts via your dealer
sorry about that!
jim