On April 6, 2018 at 00:59, highfigh said...
This is in a large, rectangular room with a 14' ceiling,
In such a large space, the high frequency will dissipate quickly. Many reason why live sound & venue type speakers use horn loaded high frequency drivers.
One of the worse things about the Proficent speakers, is the nasty sounding highs. So in a large venue like that, it doesn't surprise me they may have sounded a little more tame.