I was thinking of the possibility of making a Kef R11 clone with Purifi and the Coaxials from the Reference line (can sometimes be found on the market) which would make the SPL capability rather nice compared to the regular R11.
But I don't know if the coaxials are particularly good at high spls?
Certainly would be above average if not SOTA compared to the best non-coaxial MF/HF direct radiators