Yes they work well under speakers too. Crush weight on each cone is 10000lbs. They look blunt on the tip but if you have a heavy speaker and you drag the cones under it, it will still leave marks on the floor.
I use 'em on my KEF's and they seem to help a bit. Look real nice too as they screw right into the brass footer and spike.
Be sure to use the #4 cones as they are for heavier components. I agree with the first poster that they can still mark the floor -- although it's negligible compared to what spikes do.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.