hi Richard, apologize but I respectfully disagree...
as i said Kii three is using separate woofers to create that active cardioid pattern like w371. while the Finnish implement it with two large speakers -kii does it with 2 woofer in the back, two woofer on the side and one midrange in front. 3 sound source spaced longitudinally in the space with corresponding delay at different frequency band. it's complex and the results are a bass (relatively) free from null and peak, the best you can achieve in room, ever since it control horizontal and with BXT vertical dispersion (6 woofer on the back, 6 on the side).
hope this help to clarify my statement that the bass of kii three + BXT is unmatched by any (as far as I know) other assembly.
I see from your posts and comment we are both striving for the most important point left undealt in the audio reproduction at home, the room interaction. defintly DSP and room treatment are the way to go. it's much more important that 20db on DAC THD... we'll see who'll be first, Amir or Erin in Kii three measurements to compare to D&D.
my Best