I know a few guys who have experimented with amp sand boxes, and said the sound completely tightened up. Basically a 3" wooden litter box for your amp filled with sand.
Amp Stands - Wood or Stone
I'm in the process of relocating my audio equipment to a side wall and need to place my amps, AGD Audions, on something. Floor is carpeted. Stands will be very small and won't be supporting much weight. I have access to granite, marble, etc. (next to nothing scape from remodel jobs). Also, have pretty good relationship with a serious wood worker who is happy to cut maple, oak, cherry, most any hardwood, etc. Cost is not really an issue just looking for an opinion / logic around which material I should use. At this point, I'm thinking 1 1/2 to 2 inch thick walnut on some kind of cone / spike legs. Sorry for maybe a dumb question!