I would suggest a large area rug with an acoustic pad underneath and spike the speakers on the rug. Otherwise any gains you get with coupling to the tiles would be destroyed by the floor reflections from the bare tile IMO.
Tile floor! Help!
So normally I use the threaded spikes that screw up into the base of my Dynaudio Contour 3.0's when they are on carpet/concrete. I don't like using them directly on this new tile floor that my listening room is now residing. The tiles are a little rough not super smooth so I have to level the speakers and get them anchored properly, when I use a small amount of putty in each corner it kills the life of the sound, so out with that idea, then I tried some little clear rubber discs and that was a lot better but I'm still thinking the speakers are not quite right, Ive never had to deal with a bare tile floor ....what do you all think would work best under these speakers?