That would largely depend on the type of event, but we can handle pretty much any format easily to 2000; more depends on the venue/event specifics. We've done high schools over 2000 kids...we've done non-stop 6+ hours of techno at 129db....for the most part we have never seen our limit.
The largest event I did last year, using just my own gear, was 950 people for a wedding.
950 people for a wedding?
I don't see why not.Do you think my numbers from the Op are correct? about 250?
I would say 300 to 400 would be still sounding good. More than that and I think I would be less effective.