hardwood floors and spikes

I agree about the brass footers. Just make sure they are sized for your speakers (larger diameter for larger speakers) to avoid leaving indentations on the floor. Old hardwood flooring is much harder than newer hardwood flooring made from faster growing trees -- you may not have an issue with size if your house is older. There are many sources for these footers. They are normally 1.5 to 2.5 inches wide and about .25 inches high and they should have a dimple in them to accommodate the spike. Good luck. If you need to get some great sources, let me know and I'll look up the folks who sold me mine.

Bomarc, I'll give you my two cents (pun intended) but regardless of the theory, the spikes on top of discs have worked for me. The sound is much more three dimensional and the midrange is tighter.

Here's my theory. First, the weight of the speaker is concentrated on four very small points so the speaker is more stable. Second, the indentations on the discs further help stabalize the speaker. Third, your spouse doesn't kill you for leaving holes in the floor and everything sounds better live ;-)