Granite under your amp???

Brianmgrarcom, I too set my speakers w/spikes on granite. Believe it or not, it's not that easy to slide a spiked speaker on the granite. The spikes dig in and if your speakers are heavy enough, will scratch the granite.

My granite sits on hardwood floors - I have three small felt pads under the granite which allow me to position the speakers/granite with ease.

I too have wood floors, I use skeets under my spikes, made by Linn.

pads to protect the wood floor. The spikes are in direct contact with the granite. I removed the two front outside spikes (only use 3) that way they are all load bearing and they are all making full contact. (also it is easier to adjust the tilt (front to back) to match my seating position. No vibrations what so ever.