Minor update. I now have a Radio Shack SPL meter freshly Wallins modded. Here's a few sweeps of both my horns in room. The louder ones had stuff rattling in room - keep that in mind. Could use some EQ over and above the nothing I'm getting from the Reckhorn B-2, so I am going MiniDSP at last.
Most dips are no surprise to me. What is a surprise is the relatively decent extension to 130Hz or so, and the big peak at 15Hz (which by the way I love). I've still got these beasts crossed at 80Hz, so I'm leaving a lot on the table above that it seems.
Remember, only one horn is the SDX design - the other is the dual Tang Band, which still sounds too good to knock down and replace with another SDX unit. It would just be a waste of wood to kill it.
And with the B-2's measured response added:
All captures done with the Behringer UCA222.