hardwood floor and speaker

I used pennies, then quaters.
When you move around your speakers to repostion, pennies or even quaters may not stick with the spikes, may end up scratching the hardwood floor.
Now I use speaker isolation cones. They are more expensive ($10~20), but they worth every quaters.

I am more interested in how people treat their hardwood floor surround the audio systems. Many times I see rugs (or some sort of office carpets) underneath the whole audio systems or inbetween the listening position and the speakers.
Would it be a good practice to put such rugs to dampen (or prevent reflection?) the sound from the speakers?

I purchased Sonus Faber stones for use under my speakers ... a large, thick and heavy faux stone block. speakers rest atop the stones on their spikes and it works GREAT

the stones are $$$ at $500/pr but do occassionally show up used

I use a 8x11 Persian rug on a pad and placed in the listening 'triangle'. The speakers are on the hardwood floor just off the carpet. It does damp floor reflections. Now if I could just put one of the ceiling. :-)

BTW folks, re using coins - this metal is soft and if you use pointed cones they can penetrate/dent the coins and you can still damage a floor if your speaker is heavy. Be careful!

Use Herbies Decoupler disks under the spikes. Read the reviews.

I used to use spikes. I think cups under them have little impact. I think now, however, that StillPoints component stands greatly outperform them, but they are expensive. You might get by with just 3 individual StillPoints per speaker, but I have not tried that.