Maggies with a subwoofer system - optimization?


I need advice on how best to improve the midrange and base on my Magnapans (1.6qrs)My idea is to relieve the panels of base duty ( only feed the signal above 100 to 150 hertz to the panels and let my Swarm subs take the low end signal). I assume my midrange will improve, and the solid base performance via the sub system will fill in well. I now run a Krell S550i integrated into the Maggies, and the Krell Pre output into the DaytonAudio SA1000 Subwoofer amp.

Any feedback is appreciated - will I lengthen the life of my panels? Am I wasting my time? 

Tom8999
tom8999
@tom8999 @millercarbon Tom, I have a pair of Magnepan 1.7i on my solid state system driven by a pair of Bryston 28B3 monoblocks. As for lengthening the life of your Maggies? I think that is overthinking things. As for the bass, if you are like me, you were in Maggie bass-denial for some time. You don’t know what is missing because you haven’t heard it. Let me cut to the chase. Maggies are incomplete speakers. They need to be considered as part of a “kit”. Unfortunately, not all the components of that are obtained from Magnepan. Here is what I recommend to be in the Maggie “kit”:  1. The Maggies of your choice. 2. The Mike Powell Ag upgrade jumper and tube (in lieu of fuse). 3.  A pair of MyeStands or similar for the Maggies. 4. A pair of REL T/9i or the new T/9x subs connected to your amp(s) with high level input cables, preferably good ones (Kimber or Analysis Plus). That is the “kit” IMO. Of course I recommend an amp or monoblocks with lots of power for dynamics, transients and headroom plus good speaker cables. Do all of that and you will be in LOVE with your Maggies! Done. 
Hi. I’m listening to Quad ESL63s using a Hsu sub to handle the load below 90 Hz. I’m listening thru a Marantz AV preprocessor, so I use the sub crossover settings in the preamp to handle the integration. It’s working great to my ears (and to others who hear my rig). Using the prepro allowed me to experiment with different crossover frequencies until I found one best for my room. 
Getting the low frequencies out of the Quads really freed them up. Maybe the same for Maggie’s?  YMMV…
This sounds like what the OP is looking for. Video based on LRS but the basics apply

https://youtu.be/FvPmfhBZHWs 

Start at 23:28 


May I suggest  an 80-100 Hz crossover with the maggies? I used such on Model II, 1.7i, and LRS. Midrange clarity may improve if you have been playing it loud. Use music you normally listen to at a normal volume to adjust the volume level of the subwoofer. Enjoy!
I was unable to realize the full potential of my Magnepan 1.6QR until I bypassed the factory crossovers and replaced them with a Marchand tube electronic x-over in a bi-amplification arrangement using a Carver 275 and a pair of Carver 350 monoblocks.  To this I added one ML 800 sub with a plan to add three more.  The results, so far, have been amazing.