Originally Posted by Zilch
I have thought about the overhang diffraction thing, and concluded that 077/2405H vertical beamwidth above 8 kHz is so narrow as for it not to be an issue. I suppose you could easily determine this with a protractor and the 2405H data sheet. I believe you'll find that, even if cut midway between the present horn and the lip, there will be no interference. Let us know what you determine regarding this for future reference.
Regarding the drivers, I know what an LE15B is, and might easily conclude that those are "special" in that the 16 Ohms (8 Ohms, actually, most likely,) deviates from the standard 6-8 Ohms version (4 Ohms, actually,) BUT those seem to have Lansaloy surrounds in your pics. LE15B would be accordian surround....