Thanks for the heads up, but I wasn't specifically looking for bass distortion with those measurements since we have anechoic measurements of Kii Three with distortion at different loudness-levels. See here;70-80 dB at 3,5 meters is way too low spl to look at distortion. Have you checked your ambient noise curve?
If you want to see the distortion of the speaker itself, measure it at 1m 95-100dB.
You should not even try to eq sharp high-Q "dips" in response, they come from nulling of direct/reflected wavefronts.
My intention was to demonstrate the performance question about bass extension with the Kii Three alone in a real room since it's so heavily debated.
The rated 20 hz with two speakers in a normal smallish room doesn't seem to be a problem up to the point of being way too loud for comfort, but there's some cause for concern regarding capacity if you demand very high bass quality at somewhat loud levels or very high spl.
The ambient noise levels are around 40-45 dB below 100hz and about 30-35 dB above that. REW has a nice function that grays out the harmonics that are masked by the noise, but you can see that the 2nd and 3rd harmonics are quite audible even at or a little below the noise.
Regarding EQ, Audiolense is left in charge of everything as of now, but it's very configurable and it might be possible to set it up so that you can avoid whatever it is that concerns you. Having read a few technical discussions about what is and isn't possible with EQ where the creator of Audiolense participated on a different forum, I decided that he knows alot more about the mathematical and psychoacoustical matters than I do - and have therefore not concerned myself with it yet.
I can see that I'm running out of headroom in the speakers around the upper bass/lower mid, as expected from the anechoic measurements, and are planning to install a poor man's version of the BXT to help out.