Extreme pro audio. This is a pro audio point source horn with a 1.4" compression driver, intended for small scale (up to 200) events. This client built a sealed box for the woofer (AE TD18H+ and then used an impressive neo B&C 21" woofer in a 30 Hz horn sub. We designed the crossover for the horn and calibrated the system for outdoor use. A very fun project.
This point source horn is about 1m wide and was tested outdoors to set up the DSP crossover.
The entire system was then calibrated outdoors, set up in the way they are intended to be used.