I too did not feel that the pairing of the Red Rock amplifiers with the LS-9's was a good one.

I don't know if it was simply due to the demands of the multiple driver arrangement on the amps, back EMF from the drivers, or what.
We did run the smaller Dodd 200 watt mono blocs that Gary had sitting on display in the GR Research room after hours on Saturday, (and although there was a biasing issue with one of the Dodds and a possible bum output tube) it became immediate apparent that performance issue was simply a case of improper matching of components driving the 9's.
Only a few people got to hear this impromptu session, but it was enough to better highlight the true nature of what the LS-9's are capable of.
There were a lot of rooms at RMAF where you had to factor in elements of mismatched components, room acoustics and so on, but I'm with Jeff on this one wholeheartedly, you
can despite these deficiencies, often extract what the true potential is, particularly with experience.
In my case, I have owned and extensively listened to the flagship offerings from GR Research prior to the LS series line arrays, and am very well exposed to the capabilities of custom and proprietery designed GR Research drivers. I'm also familiar with the capabilities of line arrays, and as such, was able to not judge them at "face" value under these particular circumstances.
Knowing all this, I know that the LS-6's in the GR Research room were not even showing all that they were capable of. They still had plenty to go.
Bottom line, knowing what I know about the GR product line, and how the LS-6's were at RMAF. I heard enough to know what the LS-9's are capable of, and it unfortunately fell quite a bit short in the Red Rock room.
Despite this, after attending RMAF with the intent of seeing how the 9's stack up against what everyone else had to offer, I have no reservations about the LS-9's being my top choice for cost no object speaker.
RMAF solidified it for me.
This is the speaker for me!

I can hardly wait to get my pair!

Cheers