Hmmm...I looked at the cross-over service parts on the Axiom site. I see only a single LFR cross-over and I assume this must be for the rear driver array. This implies the same cross-over is used for the rear driver array of the LFR660/880/1100. It also implies the cross-over for the front driver array is the same as the M60/80/100 (three different ones).

Rodney, I think you can use it as an M100 without the DSP.

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