IsoAcoustics GAIA

Sometime back, I installed isometrics on my PMC Fact 12 floorstanders, and heard an immediate improvement to the base and better synergy with all frequencies. My floor is concrete slab on grade with short hair carpet and pad, so I used the spikes. Great overall improvement at a modest cost.

Isoacoustics I meant.

I use them under my Legacy Audio Signature SE's. Made a noticeable improvement in bass and soundstage (deeper, better separation between instruments, just a cleaner, better focused sound.) My speakers are sitting on a hardwood floor over plywood sheeting suspended by BCI joists. So I was probably getting significant standing waves through the floor. Obviously, in this case isolation was far better than coupling.

From my experience isolation resulted in a significant improvement in "clarity" compared to spikes.  GAIA's are a great product but in my case I moved to Townshend Platforms to minimize the impact on tweeter height.  Focal Scala EVO's do not provide for adjustment.

Any firm opinions as whether to spike or not spike the gaias on carpet?