You are running the Utahs too high.

The Mastering Labs put a big choke on it for a 1st order slope. The crossover even cost more because of the choke.



My Super Big Reds are triamped with passive eq units between the horns and their amp. This is in all probability a "one-off" created by The Mastering Labs.




These are the slopes:

HF (no passive eq added):


604 woofer:


Utah woofer (no bass boost engaged):


https://youtu.be/iGa9259pz-I

https://youtu.be/4MWmYYV1bg4