The final pictures show how a four-subwoofer array contributes to a smoother and extended low end (Fig.1), as well as a reduction in room modes (decay times) (Fig. 2-5). Active bass traps do not do much with the frequency response (Fig. 1), but they have a significant impact on modal frequencies/standing waves (Fig 2-5). Turning them on is akin to activating a subwoofer. Absorption and diffusion room treatments put the room "within spec" at the higher frequencies (Fig. 6). 

But the real magic comes from the midrange, running "full range" from below 200 Hz to above 5 KHz without a crossover.