How much of High End Audio is Horn Speakers?

I have heard the AG Duos in four different rooms, including two small rooms and liked them in all instances.  The bass sounded more even and better integrated in the larger rooms, but there was plenty to like in even the smaller rooms—vivid, lively sound, and reasonably natural tonal qualities.  

Plenty of other horn systems, even quite large systems sound good in small rooms (look at Japanese audio magazines to see how many such systems are crammed into small spaces).  The waveguide of a horn reduces the impact of room interactions and so they can work well in smaller spaces.  I don’t know where someone would get the notion that 15’ ceilings are needed—explain what you personally heard (not youtube nonsense) that is the basis for this claim.
 

Are we refering to the AG Duos in the YT video?

Or another smaller version w/o sub bass??

If we are refering to the speaker in the YT video, I'd say a  rather large size area might accomadate such a  rather huge,,,if not massive soundstage.

Horns like stats need huge areas to breathe,,othwise the listener feels he is being attacked by the speakers.

Small room for a  horn??
Ner heard such a   set up.

Wrong as usual mozartfan. I am using large horn speakers in a smaller 11x13 room with no problems.

Well, if you never heard such a setup, you cannot comment based on experience.  As I write this I am sitting 8 ft from a horn setup in a most sized room.  I have heard few systems I like more than what I have (those too were horn systems), and I’ve heard quite a number of single driver full-range systems and multi-way systems with full-range drivers.  I might be persuaded to trade in my horn system for a two-way system utilizing a Jensen M10 fieldcoil full-range driver and a Western Electric 597 fieldcoil tweeter, but then again, maybe not.  At a much lower price point, I could live with a single-driver Charney Audio speaker (with the AER driver).  In other words, there is more than one approach to design that sounds good and there is no need to insist there is only one way, much less one particular set of components, that sounds good.

Small room filled with stuff, typical Japanese audiophiler, Horns are 1/2 of one of 2 maybe 3 rooms. I've seen a few that way. BIG Tannoys in custom hand made hardwood cabinets.. I love it.. Makes sense to me.. I really like Imperials. too.

I wish I had a 20 acre speaker Museum. Makes even MORE good sense come to think of it.. :-) Second as a solar farm. Man oh man!! :-)

Regards