It seems that this was also the main reasoning behind the (tangerine) phase plug in the KEF coaxial drivers, as explained here: YouTube (time 9:14). I haven't thought about it that way before. Makes sense after all.... Why not to create the spherical wave as soon as possible?
Why not to create the spherical wave as soon as possible?
I'm interested to see what will be the outcome as the sound from the center of the diaphragm will tend to have a much shorter route through the phase plug than that from the periphery.Otherwise the general task here is to connect the diaphragm "A" by a system of phase plug channels to the conical waveguide "B". At least in contrast to a concave dome this doesn't appear that impossible -
Celestion "deep-drawn" diaphragms might be well suited for the experiment -