Hi Jo,
Great system and room.
Mind if I ask some questions?
* are the front wall (behind the speakers) corners floor to ceiling bass traps? If so, then is fiberglass used in a triangle shape or is a diaphragmatic type bass trap being used, or something else?
* I dont see bass traps in the back wall corners - are they there?
* rives usually has a large Polyfuser mid wall on the front wall. Why did they elect for a pair of RPG Skylines and two much smaller polyfusers on eith side? What is the radius of the two polyfusers?
* I'm trying to understand your ceiling. Are they planks of wood that run across the room width with the bottom of the plank pulled towards the speakers to angle the planks such that direct sound is reflected upwards into the ceiling joist cavity? Or is the bottom of the plank pulled back towards the listening position? My guess is the former.
* lastly, what have you on the floor for treatments, if anything?
What is the average RT60 (or RT30) of the room?
Great job. Enjoy!