Mixer amplifier for paging and background music system. Rated power from 60W, 120W, 240W, 350W, 500W to 650W. 2U rack mount (less than 350W) and 3U rack mount design. 70V, 100V and low impedance 4-16Ω speaker output. Mic 1-3, Aux 1-2 and master volume controls and bass/treble tone control. Short circuit, overload and high temp protection.