I installed a few in churches and they work OK down to about 1.5k then the pattern goes to crap.
It takes SIZE to have pattern control.
Something that most of the industry has "forgotten" or doesn't care about, or doesn't understand.
As long as the spec sheet says a "pattern" many (I would argue-most) people believe that the loudspeaker has that pattern across the entire operating range.
Just look at how many "rotatable" small horns there are.
But the customer is "always right", at least in their mind----------