I agree with the decouple/pads approach suggested by others here and I have had good luck with damped springs, such as sold by Townshend. If you want to try it without spending a lot you could consider an elastomer solution (basically another type of damped spring) or a less expensive spring solution like this or this to get started.
Pads or Spikes?
Perhaps you can help?
Quite a few currently sold speakers utilize four spikes on the bottom of the speaker. I have a tile floor with a large area rug. My speakers however are on the tile. The question is are speaker pads better than spikes? If so, what brand of pads are recommended? Thank you!