That setup at Axpona was the best I heard there. I didn’t make it to all the rooms, but I did make it to a lot them.
I did expect excellent sound from the duo, and am glad to see your confirmation!

The speaker and amp combination had no trouble filling that hotel room with sound...
At 20wpc the amp had no problem driving the X4's: great news indeed!

My x250.8 never leaves class A and my room is large and I play loud.
This gives me hope my XA30.5 will be a good companion for the X4's!

I understand the crossover had been reworked since the X4’s showing at Capital Audio Fest last year. Do we have any details here, dear experts?

Last, but not least, what speaker cables were employed?
