Interesting. That big hole at 38 hz has to come from somewhere. We're looking for about 7.5 feet... I'm guessing (a) ceiling height is 7-8 feet, and (b) the sectional is about 7 feet on a side so the EP350 is 7-8 feet from the left hand wall in your drawing ?

If you put the sub in the corner that will certainly reduce the 38 hz hole... I'm on dial-up now so I can't go back and check the MOAP for details, any chance you could post back the height of your room ?

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8