I have a post covering this bass array in a separate thread.
I was really lucky that the open area to the rest of the house dissipates the bass energy enough that there is no first modal dip from the bass array, unlike in my attic room.
Suspect that modal dip is the cause of the ‘hole’ in the middle. The mid-upper bass above it, and the low bass below it seems good like you noticed.
Now currently working on the low bass diaphragmatic absorber for the back wall to try and tackle this dip. More on the theory and design later, provided it works…
You mentioned Trinnov waveforming. Bro Wong also just shared this link with me, looks like trinnov is also developing in this area, not unlike Dirac ART.
