I use granite slabs (1/2" or 5/8" I believe) cut so there is a 1 1/2" border around the speaker bottom or footprint.
Self adhesive felt sheets were applied to the granite bottoms to protect the floors and enable the speakers to slide easily across my hardwood floors without damage. My granite is black and comes polished on the top but once cut the edges are dull. Simple treatment is to apply clear gloss lacquer or varathane to the cut edges and voila, they have a polished "look".
I've found that the granite also helps de-couple the speakers from the floor but still more decoupling was needed. So once I found the ideal speaker location via many placement tests, I then put 2" x 2" pieces of very high density foam under each corner of the granite. Wow!! The high density foam I found effective was one of those long, narrow pieces used in front of computer keyboards to rest the hands on.
Good Luck
Doug Olsen
Self adhesive felt sheets were applied to the granite bottoms to protect the floors and enable the speakers to slide easily across my hardwood floors without damage. My granite is black and comes polished on the top but once cut the edges are dull. Simple treatment is to apply clear gloss lacquer or varathane to the cut edges and voila, they have a polished "look".
I've found that the granite also helps de-couple the speakers from the floor but still more decoupling was needed. So once I found the ideal speaker location via many placement tests, I then put 2" x 2" pieces of very high density foam under each corner of the granite. Wow!! The high density foam I found effective was one of those long, narrow pieces used in front of computer keyboards to rest the hands on.
Good Luck
Doug Olsen