Balanced Line Inputs(4): 20 kΩ balanced bridgingBalanced Line Input Level: -13 to +22 dBu for +4 dBu outputUnbalanced Line Inputs (4): 2 kΩ unbalancedUnbalanced Line Input Level: -25 dBV to +20 dBV for +4 dBu output; -10 dBV nominalGain Adjustments (4):Balanced Line: Off to 17 dB gain Unbalanced Line: Off to 27 dB gainOutput Attenuator:0 dB to infinityFrequency Response:20 Hz to 30 kHz (+/- 0.25 dB)THD+N:<0.01%Residual Noise (below +4dBu output): 4 line level sources (unity gain): <-82 dB (wideband)Outputs (2):+4 dBu 150 ohm balanced (switchable to MIC level -45 dBu); -10 dBV unbalancedIndicators (17):Dual-LED VU meter for each input; POWER LED; LED audio mix level meter, 0 dB = +4 dBu VU ballistic: -20 dB, -10 dB, -6 dB, -2 dB, 0 dB, +3 dB; Peak reading: +8 dB,+12 dBPower Requirement: GROUND-REFERENCED, 24 Vdc @ 150 mA,Ambient Operating Environment:0 C to 50 C