Here you go. The first graph is the right speaker (green = no eq). On the left speaker (purple = no eq), I was just trying to see if I could get the dip to move up. Not the final result.It would be surprising if both speakers individually had the dip at 660, since the room layout you gave us in the opening post shows non-symmetrical placement in relation to the room boundaries. It would be enlightening to see measurements of each speaker separately, but regardless, if there was no change in response after equalizing both speakers at 660 Hz, then there’s nothing you can do about it, short of re-locating the speakers.
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