Input Impedance:150 to 600 Ω balanced, 5 kΩ unbalancedSwitching Time:10 msOff Delay:2 seconds nominal (may be extended using external capacitor)Control Output:Open-Collector @ 50 mAHeadroom: 18 dB (above +4 dBu)THD+N:< 0.030% (1 kHz)CMRR: 45 dBFrequency Response:15 Hz to 20 kHz (+/- 0.5 dB into 10 kΩ bridging input)Residual Noise:< -80 dB below +4 dBu unweighted (preamp muted)ON Gain:45 to 65 dB (Adjustable)Power Requirement:GROUND-REFERENCED, 24 to 33 Vdc @ 75 mAAmbient Operating Environment:0 C to 55 C