Phase aligned can mean many things. Linkwitz Riley 2nd and 4th order two ways are phase aligned in the crossover region by definition, even if the baffle is not time aligned. But LR2 system response requires the tweeter to be wired out of phase with the woofer in order to produce proper summation in the crossover region. Many folks prefer 2nd order systems for their more gradual overlap which can allow the drivers to be harder to identify as the music gets handed off from woofer to tweeter; a better blending of the sound.
Minimum phase system response is another matter altogether, and very difficult to achieve over the entire audible range with multi-way systems. A true first order crossover, one with 6dB/octave acoustic slopes over a couple octaves around the crossover can produce a minimum phase system response. But getting quality drivers with smooth response in the overlap region is a tall order.
Minimum phase system response is another matter altogether, and very difficult to achieve over the entire audible range with multi-way systems. A true first order crossover, one with 6dB/octave acoustic slopes over a couple octaves around the crossover can produce a minimum phase system response. But getting quality drivers with smooth response in the overlap region is a tall order.