Quatro Wood best feet

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

Guys, granite usually comes in 1.5" slabs.  Get a set of 3" and put 4 more washers on the rear spike and see how that works out.  Go to any place that sells/makes granite counter tops.  Shouldn't cost more than $300 for the pair. I went 1/2" boarder around the speaker for my size.  Measure them though as the size is a bit different than what's on the site.