The curves in the T10 document you referenced are for the Model T active; not the T10.

I'll say it again. The Model T active LW curve is horizontal. The LFR1100 active is downward sloping at 3dB/decade. Why is that?

My theory is Bryston customers believe a horizontal LW is superior. Maybe because their room walls are covered with mattresses. In a typical room, the Model T actives would sound bright while the LFR1100 Actives sound right.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated