Which 15"pro woofer? B&C or Faitalpro.....

Glad you like it !
It uses the same drivers as in the PM-90/60s, RCF mb12n35's.
I was basically trying to find a way to array the power of the PM90/60 boxes, more evenly. Their square box has to splay kinda funky-like to use multiples to cover wider audiences.

So I measured the angle where a pair of xt1464's on their own provided smooth coverage, and made that the trap angle for both the horn and Mid boxes.
Turns out is was very close to 40 degrees, and i used that.
So a single stack (which of course sounds best for home use) has a 60 deg pattern, two columns is 100 deg, and 3 is 140 deg.
9 stacks would make a full tight-packed circular array...if i was rich i'd build it just for the fun of it haha