positioning of a horn speaker

The shape of the horn figures heavily in this matter. Mine are only 40 degrees dispersion pattern. This is pretty narrow but necessary in this design so that the horn unloads at the proper rate. Mine, therefore behave better with toe-in and I am better off being back some twelve feet or more. If your horn has a much wider dispersion, you might wish to spread them further.
If, as I suspect, you are dealing with an off-the-shelf horn, there may not be any right way to perfect it and you'll have to just experiment until you get something you can live with.

Vertical dispersion is very narrow in tractrix designs and limitation in that area may be contributing to your problem.

Thanks for the info you were right about being out of phase

Ain't that always the thing?!? First, make sure it is plugged in correctly. :-) If I had a nickel for every time I have done something like this. . .

Glad you found it! Enjoy.

Call or e-mail Ty and ask him,I'm sure he would be happy to help.It's Easter Sunday and he exchanged several e-mails with me about a new pair of speakers I want him to build for me. Talk about customer service !!!!!!