Very good Samson Reference Power Amplifier. A versatile performer in a compact package, our popular Servo 170 is excellent for near field monitoring, stereo midrange/high frequency bi-amping applications and low power distribution systems. It also works effectively for powering vocals and acoustic instrument setups in small clubs, restaurants and bars. Like all of our Servo amps, the 170 is designed to ensure quiet, reliable performance every time you use it. Servo-controlled stereo power amp in two rack spaces 85 watts per channel into 4 ohms Wide, linear 20 Hz to 50 kHz frequency response for superior audio performance Relay-controlled power-on circuitry prevents speaker "thumps" Front-panel Clip and Idle LEDs for both channels Balanced 1/4" TRS inputs Unbalanced RCA inputs Circuitry protection against overheating and over-current 1/4" and push-spring terminal outputs Independent left/right input level controls with 41 detents Bipolar amplifier design Convection-cooled design for quiet performance