From Ian:

"We have kept the control on the DSP so it only affects the LFR1100. The output to the sub is always full range. This allows you maximum control as the LFR1100 and the sub are controlled separately; the LFR1100 from the DSP, and the sub from the crossover adjust on the sub. Setting the crossover to 0 on the DSP would mean the LFR1100 is running full range but it would have no affect on the output to the sub."

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