Cool vid. Enjoyed watching it. Didn't really teach me anything though. Not meaning to pile on, here, sorry.
I'm very eager to learn more about DIY speaker design and building. Good workshop videos and tutorials seem to not exist.
Would love to know about your philosophy and choices here. Can only guess you used a notch filter to tame that peak you mentioned, but would have been super cool to see that explained, along with more on your XO process, too.
Best,
R