In the end, this is what ended up fixing the issue. Moved the jumper, recalibrated and it has solved the issue. The guys over at MiniDSP were cool enough to help me understand the gain structure better and fix it.
Regardless of what boy wonder says about the LaVoce driver and its Fs, he has a very poor understanding of the physics. Tell Tom Vodhanel the 39 Fs B&C driver they use in a specific model can’t roll off at 11hz in his enclosure. That isn’t how it works, despite what TLS says. You certainly can have a 40hz Fs driver extend to 15hz.
Anyway, problem solved. Back to making music.