Floor protectors - Under speaker spikes

This was asked here not that long ago. The link is below:

http://forum.audiogon.com/cgi-bin/fr.pl?ymisc&1376707137&openfrom&1&4#1

use coins

Re Coins: I found that the sonic benifits of nickles far surpassed pennies. I think it must be the different metals. Quarters, on the other hand tend to smear the top end. I think becuase they are a sandwich of metals. If anyone has tried pre '75 quarters (silver) I'd like to know how they work out.

Try getting some nylon nuts and bolts from your local hardware store. Screw out your spikes and screw in the bolts (cut them to proper length - don;t keep them too long). Us the nuts to secure them once levelled. These will not harm your floor and will actually allow you to slide and move the spekers very easily on the wood, if necessary.

Parts Express is the go to firm for this kind of stuff, easy to order off Amazon as well.