Simonmoon I realize you did not actually say "all horns", and somewhere upthread you mentioned Avangardes as an exception.
Then you go on to say something that seems like a sweeping generalization (and presumably includes the Avantgardes?):
"I have heard more than just a few horns, in all price ranges, over the years, and I will stick with my statement. I hear the horn."
I’m not saying you don’t hear the horn. Nor am I a defender of "all horns" by any means - I also hear cupped-hands and/or edginess in most horns! But to back up Ralph’s statement which you quoted above:
I’ve had visually-impaired audiophiles in my room multiple times at multiple audio shows, who stayed for a long time, and were completely unaware they were listening to horns until I told them. In other words, they did not "hear the horn."
As Ralph said, "when done correctly, no coloration exists."
The devils are in the details, of course.