Bill Fitzmaurice is the maestro when it comes to DIY horn-loaded speaker systems. He’s got designs large and small, wedge, sub and tall. I’m seriously considering one of his designs for our new church location (I’m entertaining a single copy of the dual 12 version.)

My last DIY project served us well, but I’m looking for something with a little more projection and defined dispersion. The high SPL of all his designs are an added bonus. I’ll probably recycle my existing sub, after that I think a couple of these loaded with dual 12’s would do nicely.

Our previous PA “tops” (times 4). Those are dual Vifa 8’s (same as used in one of the older Mackie self-powered studio monitors), Audax Pro (PR series) 6 inch mid (used by EAW for eons), and Audax PR series tweet.
Vifa/Audax Cabinets
The sub, those are the venerable Swan 305 woofer from Madisound, now “out of print.”
Swan 305 X 4 Cabinet
Bear in mind, this is all in a 40 X 40 room with 10 foot ceilings.