Why not horns?

Anything weather-proof enough for the deck would be far too ugly for the house.

Aside from the effortless clarity my horns provide, I guess the thing that impresses me so much is the way they move air. There is something large and lifelike in the wave that reaches me. I'm not fluent in audiospeak so I'm not sure I can convey my meaning but there is a crisp vitality and persuasive definition in every small ting and pluck and crack. All sounds are not only well defined but impossible to overlook. It's very lifelike, very here and now. I've never experienced this from any other speaker system to this degree.

Unsound,

I thought I remember you saying something along the line that you would never have horns in your house or something to that effect. I could be wrong.

Assuming so, I'd say the deck does not count as IN your house, but once they get that close, who's to say what's next?

FWIW I have Realistic Minimus 7s on my deck. These are wall mounted and just out of reach of direct exposure to the elements. They also run off my main system. Horns would definitely not fit there for me!

Some might say bigger than life.

Some of the very best loudspeakers I've ever heard and some of the worst –where horns

I had the opportunity to listen to the BD design swing horns both in RMAF 2008 and in Europe.
This is simply a wonderful speaker
One of the best out there