Might be difficult if they only have a DJ desk. Time to grab a small-format mixer or something.
Chris
I know exactly what Mark is talking about and we are in the same business...those qsc k12's get fatigued very easily...after trying JBL SRX, VRX, RCF HDL 20, RCF ART 745, DB Tech T8's etc etc I went a complete passive Danley system..But I also always bring a Allen and Heath Qu16 digital mixer with me on events and full control over the entire system...I am very pleased with the results and plan on buying more Danley gear