QSC - 6Yr warranty!
My opinion - 10" speakers, OK for up to maybe 75 people outside.
12" maybe 125-150 depending on conditions.
15" will get you maybe 200 people, but with that many people, a sub is a good idea.
It also all comes down to the program material. Some things just sound better with more bass.
Remember, you can always turn it down, turning it up beyond distortion levels hurts your performance, and your equipment.
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-- Neil --
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