The electronic system controller shall operate as a stereo 2-way device containing crossover, equalization and limiter circuitry. Crossover frequencies, equalization and delay parameters shall be set by a plug-in board dedicated to the loudspeaker system under control. All inputs and outputs shall be electronically balanced. The output levels from the unit shall have preset limiters for loudspeaker protection. Outputs 1 and 3 shall include –3dB to +3dB level control and all outputs shall include limit LED indicators. The power supply shall be capable of operating from a 100-120/220-240V 50/60Hz AC mains power source, internally selectable by a hard wire link.