Well.
I was just referring to stock one for reference, since a previous poster had referred to modified drivers.
I wasn't saying the foam had anything to do with it.
So to clarify, coaxial horn-loaded speakers can be beamy in the upper highs.
Sorry if there was any confusion there.
Excellent and accurate description of how the foam works, btw!
What do those odd relief holes on the side walls of the horn do?