The mixer amplifiers come in 120 Watts output power. This power is directly available on 100 V constant voltage connections and on a low impedance connection for a 4 ohm load.These Plena mixer amplifiers are high performance, professional public address units with modern state of the art features. Providing a crisp call or clear music is as easy as turning on the radio. The amplifier is also surprisingly affordable, without sacrificing features such as ducking, priority and flexibility.