Why not horns?

Horns are music and instrument selective. No speakers can reproduce the sound of a sax better than a horn. All speakers are music selective to some degree.

"Horns have unexploited potential. Lets get busy harvesting their potential. Most other options seem to have reached their limits long ago"

Well said and I agree 100%. I will add that the progression of horn technology is the single best hope for getting closer to the dynamics of the live music experience. Lot's of problems getting it right as outlined above including the small market. This technology is not getting R&D funds of the larger speaker manufacturers and is progressing on the backs of a few dedicated small companies and the DIY enthusiasts.

Herman, The tweeters a horn Fostex t500amk2 , mids horn, midbass horn and the bass system is a 8ft tall back loaded bass horn. If you want full front loading of bass into infra sound as this horn does it would be 25ft l by 25 w.

Horns were the dominant speaker technology for many years, probably due to the unavailability of reasonably priced high out-put amplification. Once reasonably priced high-out-put amplification became available, horns became less popular. Now that there has been a resurgence in the popularity of low powered amplification, the popularity of horns has increased. IMHO, the recent popularity of horns has more to do with accommodating certain amplification choices, than with any inherent superiority horns might have unto themselves.

Horns can be designed to work great at less than 10ft sitting distance depends on design.