Hardwoodfloors and Spikes

I've been very happy with the conecoasters I bought from soundanchors.com, they work great with spikes and hardwood floors!! Hope this helps!

Symposium Slevte's work very well and won't hurt your floor.

LOVAN Footers will protect your floor but yet allow you to use your spikes.

I'd recommend going straight into the floor with the spikes. Putting anything between the spikes and the floor begins to defeat the purpose of installing the spikes in the first place.

And provided you do not drag your spikes across the floor the tiny indentation is so miniscule, only you will know they are there. (assuming of course that your speakers do not weigh 800 lbs each)

-IMO

I'll second the spikes (or cones) and coasters from Sound Anchor. A great side benefit of the coasters is that they are a felt like material on the bottom and I can move my Europas and Sound Anchors easily on the wood flors to try different speakers positioning. This at almost 100 lbs total weight.
Rubber sounds---umm,let's see----oh yes, Rubbery!