Greets!

This is as technically & subjectively an involved subject as it gets AFAIK and one that Bell Labs and others has been studying for over a century now, but for me it boils down to human hearing perception, particularly WRT euphonic distortion, which is the same, yet not so much for each individual.

WRT sectoral Vs multi-cells, this boils down to how each generates & distributes euphonic distortion, so one has to look at throat/horn compression & 'slap echo' within the horn [AKA Dr. Geddes's HOMs] and how the Eigenmodes across the mouth and individual cells comb filter with the horn's output.

WRT comparisons of similar horns with different drivers, it?s normally about each being optimized to a different BW, so an apples n? oranges? comparison at best.

The only way I know how to compare them is to notch out each other?s advantage. I imagine it would be hard to tell the difference between a 511/511E if they were ~ ?brick wall? BW limited to ~1.25-5 kHz.

GM