Yes, the EM100II has XLR inputs. On the 100, they are indeed unbalanced. On the higher-level models, starting with the 2x75 watt EM150, you could add optional transformer modules to give you balanced ins. Always check used EM150s and EM200s to see if they have the modules.
I played a lot of small bar and frat house gigs with A4115H cabinets in the '80s, but we usually ran four of them, and we weren't playing punk. I wish I still had our monitors from those days, Yamahas with the same 15" and horn as the A4115H, put in an unpowered wedge. They were large and unwieldy, but not heavy, since they were made of plywood instead of MDF, and kicked booty.
Good old days...