And the bass??
Look at
the crossover:
View attachment 205698
2nd order - which gives the ugly (NON-D’Appolito-like) lobing pattern
@Glitch showed in
post #74.
At least your entering this discussion on its crossover, and trying to make points like the graph above, implies you agree that D’Appolito is a
subset of MTM…my original and entire point
Your claim in post #62 that MTM cannot exhibit lobing was severely wrong, your claim in post #49 that the C22 must be D’Appolito because it is MTM and “MTM is D’Appolito” was wrong, your claim that the Wikipedia article is wrong or badly written is wrong (even though you are not shy to use that very article when it suited you to claim D’Appolito is not always a 3rd order crossover but can be 4th order too — ironic). To qualify as D’Appolito a speaker needs not only to have an MTM
geometry but also a vertical arrangement of that geometry, so that the vertical lobes will have the qualities that D’Appolito was aiming for, yet the C22 has a horizontal placement so is
not D’Appolito in more than one way. You have been on a hiding to nothing but you won’t take a backward step and it’s not a good look. Is it because you have more to lose than most, with your MA in acoustics and being a loudspeaker designer, publicly on show in your sig file?
cheers