About a week ago my trio (minus one member) played from a float in a small town parade.
A generator powered two 50 watt active speakers (Kustom PA-50). One mic and
one guitar into each, with a mic cable connecting the two, which gives each speaker the
sum of all four inputs. What a fun time! The 50 watt speakers were plenty loud. (You can see
a bit of one speaker in lower left of picture)
short video:
https://youtu.be/I4mQumWlND0