Jerry,
I'm fairly confident that with a pair of compacts, audiences to 350 would not be a problem. If you added a Thumper, or a powered sub of any kind, in all likelihood you would have more bottom end than you need and loads of headroom.
Good Luck,
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)