Helpful hint: Maybe you should try Dirac Live for room correction in the future at these shows (and at home for that matter). You get a 14 day free trial so it's perfect to use at trade shows.
I've just tried it myself and been quite impressed with the results. It will do much more than just tame room resonances. You can also use multiple listening positions in the setup versus just 1 sweet spot, which is even more ideal for trade show purposes.
Frankly, IMO, any designer not using EQ to demo equipment in unfamiliar rooms is just shooting themselves in the foot. Over 10 years ago, I remember Tact destroying other mega-dollar systems at these shows because they had built-in RCS. There have been significant improvements and other options since then - much like DACs - so it's a no-brainer in my humble opinion.
Even at home, there is little reason not to use it unless you have constructed the perfect listening room.
When I go to these shows, I immediately discount those companies that bring the wrong equipment for their demo room. It's actually comical to see some guys demo a system with cable elevators or a $3,000 power cord, yet they spend ZERO effort on room treatment.
Who are they fooling except the most primitive audiophile and pseudo media that "review" the shows? 99% of all room modes will be more audible than cable elevators or even the most expensive power cord (yes, I've heard the $2699 Valhalla and other similar Elrods, Shunyata, etc.)
I don't want this post to seem like I'm negative on EA. I've used Steve in the past to mod gear and he is one of the best. I'm just making a suggestion to prevent him from getting inaccurate assessments of his gear in future shows.
FWIW, I think it's the loudspeaker mfg responsibility to bring adequate room treatment for whatever model speaker they are using for the room size they chose to demo.