Who makes the best "Coaxial" Tweeter/Midrange design?

Tannoy and KEF are great speakers, the design is decades old, and has been improved on, they are still being built today. I don't know if you could put Elac in the same category, most all their speakers are considered to be in the budget area, although they came out with a speaker north of $5000, perhaps that one would be able to play in the same arena.

Dan

If you like Classical Music . Tannoy .

Thiel did !

I do not know who makes them, but TAD uses a very nice sounding coaxial driver.