JBL talks about their drivers in their white papers. They are capable of covering this range. The 4” compression driver in the S9900 shows some non linear breakup above 10k but The 4” driver in the Everest is beryllium and probably addresses it. Also the ring driaphrams in the M2/4367 are also show to eliminate the breakup. I think cutting out the center removes the breakup and adding two brings back the surface area needed for SPL/heat reduction.
With all that being said I think the D1 driver (used in M2, 4367, SCL-1) is about cost reduction as they needed a cheaper driver for the pro market as the exotic metal driver have to cost a tone and the pro VTX line array has 3 D1s per box, times how ever many you want 10,12… more…
Anyway the 4367 has the cleanest mids and highs I have heard to date, really special. I have never heard the other top models but based on them being made by the same designer I would imagine they are all pretty great.
white paper here.