Carl here is a link to a Ph.D thesis by Adrian Celestinos
which describes the Controlled Acoustic Bass System (CABS).
http://vbn.aau.dk/files/12831869/AC-phd.pdfThis is the way to get out of looking for the humps in your room. Don't create them in the first place.
I use a modified version of this system in my L shaped room. It works very well and results in a fairly even distribution of bass energy in the room, however the room's L shape makes complete elimination of resonant behavior in the bass frequencies impossible. When the CABS approach is used in a square or rectangular shaped room it can yield virtually perfect nullification of room resonances below the Schroeder frequency.
Quoting from Adrian Celestinos Ph.D thesis "The system can achieve good responses not only in a single listening position but also in the whole room from 20 Hz to 100 Hz having spatial deviations in a large listening area of only ± 1.3 dB in the ITU Room and ± 1.6 dB in the IEC Room, contrary to the advanced room correction systems that typically optimize to a single listening position.
Scotty