My suspicion, and I don't have much data to go by, is that the 5.25" mid-woofer is good to 150W continuous/400W peak from 250Hz to 2.2KHz.

That means each mid array on the active 1100 can take 300W continuous which means a 1500 is needed to get all you can out of the mids.

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