Anyone try Cerapucs under full range speakers?

I didn't mean to cause a ruckus here! :-) My thinking was along the lines of the fact that my speakers are over the basement on a suspended floor. I figured spiking them to the floor (which may be optimal for a solid floor) may "enhance" the coupling to the resonating cavity below. I wondered if dissipation in this case might be a better option. I'll admit I don't know much about this! 

We call that a trampoline floor. So, in effect, you are coupling the speakers to a moving floor, a vibrating floor. Don’t worry about the cavity resonance. You have enough to worry about already.

So in this case, is spiking or decoupling the theoretically better option? (All determined ultimately by listening, of course.)

Decoupling. Even on a cement slab decoupling is better because the cement slab is moving, too, just not as much. Also, because decoupling reduces any tendency for mechanical feedback in the system. 

I just saw this advertised and thought it would be worth discussing on here