100 Watts - 4 Ohm unbal. * 8,16 Ohms, 25V, and 70V balanced * 220W - Classic series - Versatile, reliable , economical, the "Classic" Series PA Amplifiers are the most widely used Bogen PA Amplifiers * Offering a choice of models from 10 watts to 100 watts * Built-in balanced low impedance microphone inputs * Built-in microphone precedence circuit * They can operate even at extreme temperatures. Thermal and electrical circuit breakers protect the "Classic" series amplifiers against any abnormal heat buildup and short-circuited or overload out puts. Rack mountable (Requires RPK50) and UL and CSA listed. C35, C60 and C100 intended for medium to large applications.