So maybe you added some new speakers, or the stage just doesn't have the connections you need. Seismic Audio Speaker has the solution - an adapter. It's crucial to keep a bunch of adapters with different connections on hand just in case you need to make a change in your equipment setup. You can't have a concert without working speakers. So buy a few adapters...we've got a boat load full of them, with all sorts of different connection matchups, like speakon, 1/4", XLR and more.