Mythbusting: "Phase correct speakers" are not phase correct (in relation to the drivers)

When people talk about "phase correct" speakers, the extent of phase correctness just extends to the crossover region. Not the entire frequency range. DSP can correct phase response (it can correct anything), but it also injects its own gremlins as the behavior of the system is more complex than just phase and amplitude. This video is not about the DSP, it is about the behavior of the loudspeaker drivers, and what is it that people call as phase correct loudspeakers - they are not phase correct, just they have no abrupt phase discontinuity.