Its been a while since i read up on cab design, so rather than getting my books out can Bill and or Phil explain about phasing, as I believed that cab design and their porting - length and size (Diameter) of port was so that the air from behind the cone reached our ears in phase with the air from the front. If i am correct how dose this get achieved from both these opposite designs. I am in the Front port camp, pending the reply 😉.