User211, from the above it would certainly looks like the point you are trying to make relates to dispersion - if this is not the case then you will have to clarify. No doubt the direct radiating bass from the horn speaker and the actual horn mouth do have different dispersion characteristics, but then so will the line source ribbon tweeters and the bass panels in your own speakers.
Edit: OK, have re-read some of your posts and they were as I recalled - perhaps you should re-read mine without your 'Apogees are the panacea to all issues' glasses on? There's no 'magic bullet' here.