Removing spikes... Now my speakers sing

Wilson Audio Sophias/Wilson spikes/Herbies Gliders, brass/wood floors over concrete are best for me.

Spikes works best it they can be tightened down completely - and if more than 3 spikes making sure that they properly adjusted so there is no "rocking" - IMO this tightens the bass - improves image etc.

Good Listening

Peter 

Shag rug...is it lime green? That's a fave...

Too many variables in play to recommend a specific approach. The design of the speakers - port in the bottom/front/rear, weight, type of the floor (what's right below the speaker, next layer, etc.), height of the rug, etc., etc. What works for me may and probably will not work for you. Rule of thumb; couple with concrete floor and decouple/isolate from suspending floor. My experience FWIW.

I have listened to IsoAcoustic Gaia demos, and they were very convincing.