Horn based loudspeakers why the controversy?

I refer to my system as a "Japanese" system (in fact, the Western Electric drivers came from Japan) because it is much like systems you will see in Japanese audio magazines.  Such systems are crammed into tiny Japanese apartments.  What they excel at is sounding lively and full at LOW volume levels, which is a necessity given the thin walls of these apartments and the extremely polite and considerate culture of the Japanese.

My system actually has very modest bass output and does not go very deep.  The drivers are light weight, and have a pleated paper surround that limits excursion.  These drivers excel at delivering clean and tuneful bass; just not that much of it.  I've heard systems with twin 18" drivers based on similar designs that also have somewhat limited bass.  Even when playing music with powerful bass, you can barely feel the cones moving in and out; they vibrate but to not pump in and out very much.

Mozart - my Grande Voix speakers are the black ones with wood tone  horns on the Viking Website. 

most of the worst speakers ive heard was horns.

when horns sounds coloured, nothing else in the audio world is so unbearable to my ears

Absolutely true murphythecat. Horns can be the most annoying loudspeakers to listen to but, don't hold that against all of them. There are some excellent sounding horn systems out there and because they are strongly directional can be easier to set up then regular dynamic speakers. Room acoustics are not as critical and you can get a pretty decent image out of the box. Their efficiency allows you to get away with a much smaller amp and save money. However, horns are big nd they will own any room you put them in not just because of their size but their appearance also. You could make an argument that my ESLs blend in but, there is no blending in with naked horns. 

...  horns are big nd they will own any room you put them in not just because of their size but their appearance also. You could make an argument that my ESLs blend in but, there is no blending in with naked horns.

I don't know why one would necessarily want big speakers to blend in visually - kind of goes contrary to their nature. If you got the dedicated space to house something like big horns, let them unapologetically take up the environment they inhabit and functionality have its say. I for one like the purity, honesty and looks-by-way-of-function not watered down or over aestheticized. I lets you know their true purpose.