I'm very impressed by Audiohorn's approach to horn design, though I'm still plowing through this. https://audiohorn.net/sciences/critical-distance/
Meanwhile, what are the criteria for choosing between the X-40 horn and the biradial horn?
Audiohorn recommends specific drivers to use with these horns. For Biradial: 18Sound ND3T-16, Faital HF144, (JBL 2450SL (virtual uobtainium)
For X-40: 18Sound ND3N, FaitalPRO HF1440/1460, 18Sound 4015, (JBL 2450SL (virtual uobtainium)
But might either of these drivers work well with one or both of those horns? https://www.usspeaker.com/radian 745neoBepb-1.htm
https://www.usspeaker.com/radian 760neoBepb-1.htm
Any issues with their phase plug or diaphragm design or crossover frequencies?
My midwoofers are these which Troy Crowe tested.
Meanwhile, what are the criteria for choosing between the X-40 horn and the biradial horn?
Audiohorn recommends specific drivers to use with these horns. For Biradial: 18Sound ND3T-16, Faital HF144, (JBL 2450SL (virtual uobtainium)
For X-40: 18Sound ND3N, FaitalPRO HF1440/1460, 18Sound 4015, (JBL 2450SL (virtual uobtainium)
But might either of these drivers work well with one or both of those horns? https://www.usspeaker.com/radian 745neoBepb-1.htm
https://www.usspeaker.com/radian 760neoBepb-1.htm
Any issues with their phase plug or diaphragm design or crossover frequencies?
My midwoofers are these which Troy Crowe tested.

Altec 416-8B in 100L Sealed
In this blog post I test the Altec 416-8B in a 100L sealed enclosure. Testing was done outdoors for the frequency response and then brought indoors for the distortion testing. The woofers are new from Great Planes Audio. A customer has sent me the finished cabinets with drivers to integrate...
josephcrowe.com