Speaker stand question

I built some speaker stands ( with spikes) for my Time Windows. The top of the stand is wood, as is the bottom of the speaker. What should I put between the speakers and stands?
Four small dots of Blu-Tac or similar.
'moon gel', which is a drummers tweak available from most of the musicians gear stores. Very inexpensive and works wonders.
You can also go to Home Depot and buy some rubber feet and fasten them to the top side of the stand. I used the ones that have holes in the middle and screwed them down with small pan head screws. They work wonders and it gives the stands a nice finished look. The speakers are raised about 3/8" off the stand when done.