recommendation to dampen bass for wood floors

HI,

I was hoping for a recommendation to dampen bass on some recordings for wood floors where I am using wilson puppy speakers with spikes. My retailer gave me some little discs that protect the wood floor but they are too thin and flimsy to do anything else. Anyone in similar situation or have some suggestion. For the most part, the dynamics are fantastic. I am looking for a slight reduction in the bass which I attribute to the wooden floors. I have moved the speakers are around and that has not helped and the speakers are not too close to any back or side wall.

thanks

Michael