What Ernie said. I have a couple systems like what you've described. 70v with a connection for a DJ or local band to connect their mixer. And if possible, cut that input on your system back just a bit to keep some middle aged moron that's trying to still pretend he is 16 from blowing up your system. The kids you can threaten and make them listen.
Civil War reenactment is LARPing for people with no imagination.