Notice how he doesn’t answer the very pertinent question at 12:22 ! It’s a 2nd order non-minimum phase crossover so needs to have some drivers reversed in phase otherwise there will be a notch in the response at the crossover frequency. Because of this it will have a hideous step and impulse response which begs the question as to why they go to great lengths to time align the drivers with this type of crossover ? Then they go to great lengths to minimize cabinet resonances with special materials etc and then they whack a great big hole in the bass cabinet for a port and let all of the internal cabinet and port resonances escape into the open ! This company seems to be focused on marketing than solid engineering principles.