Wayne Parham Messages: 18787 Registered: January 2001
Illuminati (33rd Degree)
I'm not sure exactly what you're looking at, but the center-to-center spacing of the drivers in the three π loudspeaker is more like 285mm. The cabinet is approximately 765mm x 510mm and the center of the woofer is 355mm from the bottom. The center of the tweeter is 125mm from the top.
Also, I would not suggest aligning the voice coils if you plan to use my crossover. It is designed specifically for the spacing that is created when both the tweeter and woofer are baffle mounted, which creates some offset in their fore-aft positions. The crossover phase and baffle positions combine to create a perfectly centered forward lobe. If you move one of them, then the forward lobe will shift up or down, depending on the alignment of the drivers. You don't have to move either one too far to put a null right in your face.