Originally Posted by tuxedocivic
Measure on the axis you'll listen to, then choose the polarity with the most SPL between 1 and 3 kHz. Because of the large woofer, this speaker changes phase rapidly while moving above and below axis, so either polarity CAN work in a way.
Thanks for the direction, I think I may choose reverse phasing. It feels more correct to me aiming the speaker directly at my MLP instead of 14 degrees downward towards the floor.
I drew a diagram to illustrate to myself how tilted these would be at 10 feet away and elevated to center them behind the screen. They would have to be tilted an extra 13.5 degrees downward at normal phase.
I also averaged my -2, 1, and 4 (average 1" above throat of CD) reverse polarity measurements and graphed it at 1/6 and 1/1 smoothing. I did the same for 12, 14, and 17(average 14.3 above CD) normal polarity measurements.
They are similar, however the reverse has more output from 1k to 15k. The blue is normal polarity, red is reversed.
I think I have solved it for myself, I probably want the reverse polarity tweeter. Did I miss anything or is that a good call?