Spikes or Spikeless

Mine is a tad different still. Just berber carpet glued to the concrete floor, no padding. My Paradigms need the spikes to sit solidly and they sound better with the spikes, no question. My Aerial 10t, with the Sound Anchor stands mind you, sound the same no matter if spikes are used or the heavy rubber feet. My horns are too big to care. In fact, the bass horns were designed to acoustically couple with the floor so they need to sit flat.

WAVE KINETICS 2NS Loudspeaker Interface System
http://www.wavekinetics.com/2ns.html
These will solve your problem & give you the results your looking for.
My highest Recommendation.

Ended up using the extremely sharp spikes on the front 2 post of each speaker. While using a not so sharp on the 2 rear post.
The front drilled through to the concrete and the other 2 rear ended up not going so far....
Got them all balanced and they decoupled the speaker from the floor and prevented unwanted damping.
Really sweet sound.
Thanks for all the adavise....