What do you put underneath floorstanding speakers?

If your floor is hardwood you can do one or both of the following:
1. Put small felt pads on each corner (felt is used in pianos for dampening you know)
2. Cut four small squares out of a sheet of cork (office depot etc) and place them under each corner. (cork is mostly air and is used to sound proof rooms.

Carpeting your whole room is absolutely not necessary. Granite and other rocks do not absorb or defract sound or vibrations.

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.

For my B&W CDM 9NTs, I recently put a 1 1/2" thick soft wood plank(14"x 10"x1 1/2")not MDF, with amazing results.IMHO the improvement is dramatic with the CDM series because the spike quality is awful.You can effectively embbed the speaker in the softwood such that there is no lateral movement.Of course this home spun technology will only work for relatively lightweight speakers. The 9NTs weigh 26kgs or so, or 60 lbs.
Have a great new year.
Sunnyboy

Timken Bearings in conjunction with DH Cones sound superb

Details

Should have checked backed sooner.

..........Pads of concrete.