I have laminate floors and I also use the SVS Soundpath feet under my Velodyne DD 10 sub. In my case, the sub sits on a small slab of granite (19" x 16"), which in turn sits on a thin rubber mat of the same size. I am happy with the sound and even happier that my adjacent neighbors don't complain. Lots of good advice here, so best of luck with your particular situation.
Vibration dampening
After reading the article on Herbies isolation products, I got to thinking: My sub has more vibration going on than anything else, at higher volume you could put your hand on top and it feels like a massager..I am using spikes on thin carpet with concrete underneath. Has anyone had positive results with these or other isolators? It is a Velodyne DD12.