@audiokinesis Thanks for that input. See I keep thinking about Snell’s downward firing cone and the behavior that the 3-4" high slot would have. Not that I can replicate it in my current listening environment, but still find very few speakers with that sense of the speaker dominating the air pressure in a room like that.
I had thought that the slot loading was a kind of low pass filter, and when you mentioned the tweeter and close wall placement I had to rethink what I knew.