Can there be room modes that are too tough to tame? I have a room that is 23X13 with an open double doorway to a 14X22. My sub is placed in a corner furthest from the double doorway. I have a broad peak from 45-64 hertz of 10 db. I can tame most of the peak, but a peak at 46db remains no matter what. I can center a band on 46 hertz with a bandwidth of 10/60, apply 48 db of cut and only reduce the peak by 2 db. Tomorrow I will try to move the sub out of the corner. This does not bode well for WAF. Also, when I work on the broad peak, no matter how I attack it, I lose 6 to 7 db at 52-54 hertz. I have the BFD software. But it hasn't been able to help. Any ideas?