but can't correct main and sub separately in the overlap region
It does knock down the overlapping frequencies affecting both the speaker and sub. But it measures the same as using bass management. It sounds just as good but it's soooo much easier not needing bass management and having to throw away $1200 for Dirac. Calibration is also a faster and shorter process. Also, newer subs have their own EQ so you can still manually adjust it separate from the speaker after or before running room correction. Also my B&W subs have defined settings to match the speakers. Overall, there's pros/cons with both bass mgmt and high level.

