The CSA2120R is a professional-grade power amplifier built for installed sound applications. It is a two-channel model featuring simple analog front-end processing and a switch-mode universal power supply. Each channel has dual summing RCA inputs and a 3-pin detachable Euroblock input. Both channels also offer a selectable limiter and high-pass filter at 70Hz. The amplifier is equipped with a 4-pin Euroblock output connector for powering dual loudspeakers. The auto-standby mode, a feature for energy saving, disables the amplifier's pulse width modulation generator when no signal is detected. It's designed with over-heat and low-voltage protection for reliability and can be rack-mounted with the included kit. Front-panel channel volume controls, clip, signal, and power LED indicators are also included.