What do you put underneath floorstanding speakers?

the suggestion that rlwainright made works great,the pads he is talkin about are made of rubber, i use a simular product called (humane pads).

the density of the humane pads far exceeds anything you will ever get at home depot or places like that,humane's are 1" thick x 3ft x 4 ft & are coal black.

these pads are kinda pricy though at around $100 each but they work great.

mike.