I'm just about ready to cut the speaker-holes for my new speakers. I'm still deciding if I should flush mount the drivers to reduce diffraction effects or not. Flush mounting it is more difficult, because I must get the router set properly etc, and doing it for the 2370 horn is also more a pain in the ass. But I'm just not sure weather or not it will make a difference. From what I know, the diffraction caused by non-flush mounted drivers is not anywhere near as much as cabinet edge diffraction, interaction between point sources, and other parallax issues etc.

I have the tools to flush mount, but its just a pain to do it. Any ideas?

Thanks!
Adrian