[Wayne A. Pflughaupt]

Matt,

IMO your response is highly problematic, to the point that it’s probably unequalizable. You have about a 30 dB or more differential between some of your peaks and depressions. That needs to be narrowed to something workable, i.e., ~15 dB or less.

Often when we see response this bad, the problem is a bad sub location. Do you have any other placement options? I’d try a good corner (i.e., one with no unsealable openings in either wall), if you have one available.

Also, it appears you applied some equalization way up in the 130 Hz range. You don’t have your sub crossed over that high, do you? There’s usually no need to apply equalization above the crossover frequency.

Regards,
Wayne