Maggies and subwoofer integration

Large panel Maggies require tons of good clean power

No question. I 100% agree. My Maggies never *really* sang until they were actively biamped with 2 amps rated at 500w into 4 ohm (doubling from 8).  Getting those active crossovers out of the picture was a game changer. 

the transparency and neutrality of the music we listen to, getting rid of the inherent sound signature of the box

It’s possible you’re crossing over at too high a frequency? No question I can still hear the detail and agility of the Maggie bass panels. RELs don’t bloat that way.

That said, to each his own. My mother liked ice cubes in her wine. People put ketchup on $50 steaks. I like depth to sharp drum strikes.

Check out Mike Powell's site, "The OCD Guy".  He seems in touch with matching subwoofers to planar's.  With Quads, I have never heard a subwoofer keep up with them.

I have a pair of LRS and use the big HSU VTK-15h MK2 and it works very well for me. I recommend, and am able to cross over my LRS at 80hz.  I use a Oppo 205 source and am able to set the crossover point.  People  say that Magnepans  don’t need a sub but I disagree. At least regarding the LRS anyway. In my room the LRS have about as much bass as two transistor radios.  With good tuning and setup they sound awesome.  I recommend a sealed sub not ported. My HSU has both options but I always run it sealed with both ports closed.  The trick is less is more. If you run to sub set to high it draws attention to itself but if tuned properly it disappears. I suppose everyone’s rooms and systems are all different but for me it works great.  I noticed that with the LRS if run full range and playing anything moderately loud with heavy bass the panels will distort, the 80hz high pass is the cure for that.

@gumbedamit +1,000!

@arnold_h the LRS would fall under the small panel category as needing a sub, no disagreement there.