I've decided to tackle this again but in a different way. Room EQ was turned off, and the crossovers were set to 200Hz, the highest available setting on the AVR. Each graph has the 3 measurements across the width of the listener position (couch) but at a different location within the room.
View attachment 44262View attachment 44263View attachment 44264View attachment 44265View attachment 44266
I thinking I'm going with the new location as I get less variance across the seating position and another octave of response before it rolls off.
I have to play with Rythmik's settings next changing the roll-off of its filters and its EQ from extension to more midbass. I think I can get away with one sub based on what I'm seeing but I'm not sure.