The Extron MPA 601 is an ENERGY STAR qualified mono audio amplifier delivering 60 watts rms output. Housed in a compact convection cooled and UL 2043 plenum enclosure, it meets UL requirements for in-ceiling installations. The MPA 601 employs a highly efficient advanced Class D amplifier design featuring our patented CDRS - Class D Ripple Suppression technology providing a smooth, clean audio waveform and an improvement in signal fidelity over conventional Class D amplifiers. Three stereo inputs are summed together so three separate sources can be connected simultaneously. With more power in a compact design, a defeatable standby timer and professional performance, the MPA 601 is ideal for applications with space restrictions that require sufficient power for a small to medium distributed audio system.