They had a Vyger Indian turntable playing at that show. I remember finding some friends at the show and dragging them down the hall to hear that incredible setup. Yes, one of my votes for best sound at the show. Don't remember what amps were used, but they were tubed.
From what I remember the Calix had a sound that I believe horn lovers would appreciate. However, there was none of that tunnel vision sound at all. Very smooth and cohesive with lots of dynamics and detail. Yes, there was soundstaging too, which I find I don't hear in most horn systems. And they look damn cool.
Enjoy,
Bob