Eldartford, silly question, than.
If 6db / 12db are 90degrees apart, how could you get the drivers back to phase in the Magnepan 1.6, which I have confirmed does use 'one of each' in its x-over? Seems they'd be 90degrees out?
Also, with most if not all modern rock, absolute phase is strictly of academic interest, since no effort is made to preserve or even identify phase. On some recordings in the past, my absolute phase switch made a difference, on most recordings, not.