I bought one of these today:
During the last DG tournament in the prison, my old PA was struggling, so my buddy hooked one of those up and holy **** are they ****ing loud. So, me and another friend agree'd to both purchase one for the next event. Between the 3 of us, they'll be able to hear us in Kankakee.
https://www.youtube.com/watch?v=5Hfe_1Fny-Q