I have gone through a number of speakers/amps over the years. Currently for a REALLY small gig, I might use the built-in speakers (of my KN-7000 or S900), more likely I take a pair of Roland CM-30's. For medium gigs and bigger, I take my Yamaha StagePas 500's - either on floor angled up or on poles depending on the layout of where I'm playing. For even larger gigs, I add a subwoofer to the StagePas, but this is needed rarely.

About 50% of my solo gigs are for Retirement Communities and similar, where the audience can be anywhere from 30 people to 200 depending on the place, event, etc.