... Ratio Input-70dbTourClass ProtectionACL,IGM, AutoRamp, short circuit, DC voltage, turn-on/off transient, current inrush, sub/ultrasonic inputOperating voltage 230 ... k Ohm, balance or unbalancedLevel adjustment (per ch.)Front-panel potentiometer, 31 position detented from -inf to 0 dBDimensions (W×H ...