Interesting observation regarding Avantgarde speakers (or probably any good horn system) at hi-fi shows. I've taken my own speakers to shows in the past to help Art Audio demonstrate their great amps.
There is a fundamental problem with horns in demo rooms where a large number of listeners need to be impressed. A well-set up domestic AG system requires very accurate setting up, especially toe-in. This results in spectacular sound in a small sweet spot. This set up is inappropriate at shows so the likelihood is that the speakers will be compromised by facing them far more forward-facing than is ideal at home. This results in "good" sound throughout the room, but not spectacular for any listener.
I'm sure Mike will agree with is summary of why AG speakers often fall a little short of their potential at shows and that his own expertly set up system (with Jim Smith’s help) was far better sounding than he could achieve at an audio show.
