The class D Power Mixer amplifier have power rating from 250W,350w, 450W, 500W. They are featured of four microphone inputs, three three-line input and one aux output. Individual gain controls are provided for Line, AUX, MIC, Treble and Bass Control. 70V, 1OOV and low impedance 4-16 ohms’ speaker outputs are provided. Extensive protection from short-circuits, overload and high temp. Heat vent from sides and fan having auto start feature, infinitely variable speed.