Thank you very much, Tim! Glad the Debra is working well for you!
The only question mark in my mind regarding imdoc’s situation is, whether his room has something going on (large area and/or open floorplan perhaps?) that results in minimal boundary reinforcement in that bottom octave. It sounds to me like his primary issue is a shortfall in bass quantity, to the extent that if there is a qualitative mismatch between subs and his big Maggies, it hasn’t been obvious yet.
Both the Debra and the Swarm are "voiced" with the expectation of about 3 dB per octave of gain from boundary reinforcement below 80 Hz or so. There is a fair amount of adjustability built in, between the equalization available in the amp and the other setup options, but it is possible that he needs more bottom-octave energy than our systems provide in their "stock" form.
So while I think we have a good solution in the room-interaction domain, in this particular situation I don’t know whether we’d meet the quantitative requirements. Not that the four 10" subs in the Debra and Swarm systems are wimpy (their motor strength is unusually high, and many of our customers have measured in-room -3 dB points around or below 20 Hz), but maybe he’d be better served by four 15" subs that are voiced "flat" rather than voiced with typical boundary reinforcement taken into account.
Duke