LOL, more wisdom from Audiogon's own speaker guru. This @erik_squires sprouts, regurgitates and flaunts himself across as the authority on loudspeaker design. Been at it for a while. Sad really. With over 17K posts, he could have spent more time studying and learning from true experts like Joe D'appolito, and Vance Dickerson. I have both those books which I can sell to you, but perhaps you should Start with David B Weems' Designing, Building, and Testing Your Own Speaker System with Projects if I can find it. First publication was about 1980. It's very useful, Erik.
Depending on XO design particularly when using 2nd order XOs (12dB/oct Erik) and the physical spacing between the acoustic centers, the designer will invert phase electrically to be in phase acoustically, Erik. As has been mentioned in earlier posts here.
I do understand the fun you must be having, copy and pasting stuff off the net. Please don't overlook ChatGPT, very useful.
Oh, and Erik, did you not notice the speakers on spikes? Now, I would have agreed with you had complained about that.
Criticizing someone's product like you did is very bad form, Erik.

