C2G/Cables To Go 40881 audio amplifier 50W 70V is the ideal solution for supporting a distributed audio system in a classroom, conference room or other environment that requires installation in a plenum space. This amplifier supplies 50 watts of power, 25 watts per channel, and is built to an industry standard 25/70 volt design. This amplifier supports many advanced Features which make it a perfect fit for most applications. This amplifier accepts a 3.5mm and RCA stereo audio input as well as a 3.5mm microphone input. The mixing function ensures that audio from all three inputs are mixed and sent to the speaker outputs. This amplifier is designed to accept either RS232 control or control signals from an industry standard volume control. The PA sensor will automatically mute the audio inputs of the amplifier allowing the public address to be heard. The accessory power output provides 12 Volts DC and 500 Amps. This makes the amplifier the perfect match for a controller such as the TruLink a/V controller.