What should I use between spikes and wood floor?

I use short spent pistol shell casings.Plenty sizes shapes and use softer alloys in aluminum or brass. Polish up very nice. Spike sets through neck and flash hole on primer anvil. Taper of the spike self-limits at the flash hole keeping it from pushing out the dead primer.If you want weight distibuted on more floor area a larger spent shell such as .44spcl/mag/.45acp are very common and easy to trim down w/Weiss snips if needed.

I initially used quarters under my Revel Salons (which are, admittedly very heavy speakers) and found that the spikes gradually drove holes through the coins and into the floor. I switched to Sound Anchors Conecoasters to rectify the problem.

Link to Sound Anchors Web Page

I was pleasantly surprised to find that the Coancoasters do what they are advertised to do. They do an excellent job of minimizing the vibration that is passed through from the speaker to my suspended wood floors. The resulting impact on the sound was tighter bass with noticeably less vibration of the floors. Common sense would tell you that coins would accomplish roughly the same thing. However, with my system and in my listening room, the Conecoasters produced a noticeable improvement in sound quality.

Thanks!

ditto on don't use the pennies...or other coins...before I ordered the audiopoints the Vandersteen 2cesigs poked holes through pennies as noted above...and it only took about a week or two.

I use my grandmother's old glass rug protectors that she used under the sofa feet......