Quote Originally Posted by bfish View Post
So, for the record, Western Electric included "partitions" (fins) in their sectoral horn designs (at significant added manufacturing expense) for the functional purpose of "reducing reflection effects in the sound passage".

Right, something I forgot to note is that they break up the mouth's eigenmodes to much higher frequency ones to further 'scatter' whatever HF output it has and reduce the amplitude of any reflections back to the throat, so if 'de-vaned', either a foam plug in the throat ala the Geddes speakers or plenty of damping around the mouth ala Peavy's Quadratic horn design seems the thing to do for smoothest overall performance, either of which will roll off the extreme HF a bit more.

Thanks for the reminder! I'm increasingly needing them these days.

GM