... Posts 2-poleClassTDTourClass ProtectionACL,IGM, AutoRamp, short circuit, DC voltage, turn-on/off transient, current inrush, sub/ultrasonic inputOperating voltage, 230 ... , 44 dB selectableInput impedance20 kOhmLevel adjustment (per ch.)Front-panel potentiometer, 31 position detented from -inf to 0 dBDimensions (W×H ...