I am quite well connected in the loudspeaker World.
Have hung around with Troels Gravesen, Lynn Olson, Joachim Gerhard and a few others. Can't say I always agree with everything they do or say, but it's ongoing.
Am sufficiently well versed in Physics and Mathematics to know what a Linkwitz-Riley LR4 and a Butterworth BW3 is.
Time alignment, impulse response, distortion and dispersion hold few mysteries for me. It's how it works.
My best recommendation is to hang round with people who are trying to put something back, along with making a living.
One of my favourite good people is someone you may not know:
https://ampslab.com/blog/why-build-speakers/
Michael Chua is an absolute gentleman. He has sent me details of his designs by email. And they are top class. We have talked about things. He gives it away for nothing. As do I.