Originally Posted by AustinJerry
I am not familiar with how the room simulator works. However, the formulas in the room mode calculator are simple mathematics, and are accurate.
the room mode calculator just tells you where the modes are, the rew room sim solves for modes and the listening position (and delays etc dialled into each source).
As far as I can see, placing the MLP and the sub at the same distances from each wall (at 1/3 the length) produces that dip at 45Hz. I'm not entirely sure why.
It doesn't look a great room for 1 sub tbh, how big is the listening area? do you have multiple rows of seats? for a single seating position, sitting at 1/5 the distance from the rear wall and a sub in the corner looks about as good as you can expect.