You commented that the length of the sides and thier angle control the dispersion in a low-mid horn. But do you know how I would go about making that 60x40 to match the high horn?I have used horn resp, before but I am just not confident of my results. I have a very hard time getting any response abouve 1000hz out of any mid horn I model in it. Perhaps I should bite the bullet though and take a shot at building one.
You commented you like Constant Directivity Radial horns, one of the horns on the top of my list is just that. Do you happen to know if Eminence's TI2000 is a nice sounding, good quality horn?