I just got a call to do a job Sunday at an automobile race track. It's a picnic and awards ceremony (no racing). I did it a couple years ago with two JBL Powered Eon 15s, and while the people up front were blasted away, the ones down the bleachers away couldn't hear.
This will be the ultimate test for the Bose. There should be 6-700 people there at least.
DonM