link between speaker and floor

You can still use your spikes, just put some pucks under them. Audiogon member esoler makes some stainless or brass pucks for about $5 ea. I have found they even improve the sound. Cheers! John

When I moved my system to a beautiful black ceramic tile floor, I used 1/2 inch Walker Discs under all the spikes... no spike holes or scratches.

What also might work well is if you place a 12x12 1/2-inch thick or larger stone tile under the speakers and spike 'em to the tile. Gives a good solid foundation. Worked very well for me.

I like the Aurios Pros. Basically these are two metal disks with ball bearings between them. They don't have any spikes. I found they decoupled the speakers from the floor quite a bit more than spikes. I have heavy full range avalons, so the pro's were the best match.

The aurios give you more image focus and less haze. The presentation also seems to be quite a bit more natural. The room vibrates far less than before which is very good for the electronics - especially my turntable.

A potential downside is that the 'amount' of bass is perceived as being less. You don't have your room structure reinforcing it.

Another solution is to use Jenga Blocks with Home Depot cork dots adhered to either side. Works ok.

placing coins under the spikes will do it...
or get the pucks from any number of manufacturers: Audio Points' pucks are small & inexpensive