Sound Devices 442, User Manual And Technical Information, Page: 25 / 34

23
Speci fi cations
Measurement Settings (unless otherwise specifi ed): Gain controls for the channel being measured
at mid point, all other channel gains fully down; pan controls centered; low-cut off; inputs in 'MIC'
position; outputs in LINE position. Mic input driven with 150 ohm source. Outputs measured with 100k
ohm load. Temperature at 25°C
System
Dynamic Range 115 dB minimum (trim fully down)
Metering 40 segment, sunlight-viewable,
selectable peak, VU, or peak (with or without peak hold) with VU ballistics, variable brightness
Analog Inputs
Frequency Response 20 Hz to 30 kHz, +0.2, –0.5 dB, –1 dB @ 5 Hz and 50 kHz typical
THD + Noise 0.007% typical (1 kHz, +4 dBu at line out)
0.09% max (50 Hz - 20 kHz, +18 dBu at line out, fader fully up)
Equivalent Input Noise - 126 dBu (-128 dBV) maximum. (22 Hz - 22 kHz bandwidth, flat filter, trim control fully up)
Input Type XLR Mic: Transformer-balanced for use with <600 ohm mics
XLR Line: Transformer-balanced for use with <2k ohm outputs
RTN A,B (3.5 mm/TA3/Multi-pin): Unbalanced stereo for use with <2k ohm outputs
Mix In: Unbalanced stereo for use with 442 Mix Out 1.8k ohm output
Input Impedance
(ohms actual) XLR Mic: 2k ohms
XLR Line: 16k ohms
RTN A,B (3.5 mm/TA3/Multi-pin): 20k ohms
Mix In: 4.2k ohms
Input Clipping Level 0 dBu minimum (trim control fully down)
Maximum Input Level XLR Mic: 0 dBu (0.78 Vrms)
XLR Line: +40 dBu (80 Vrms)
RTN A,B (3.5 mm/TA3/Multi-pin): +24 dBu (12.4 Vrms)
Mix In: +6 dBu (1.5 Vrms)
Gain Matching Mic/Line inputs: +/- 0.1 dB
Common Mode Rejection Ratio 120 dB minimum at 80 Hz, mic input
100 dB minimum at 10 kHz, mic input
High-Pass Filters Sweepable 80 Hz to 240 Hz, 12 dB/oct at 80 Hz,
6 dB/octave at 240 Hz
Mic Powering
(each analog Input selectable) Dynamic (no power applied),
12 V Phantom - though 680 ohm resistors, 10 mA per mic available,
48 V Phantom - through 6.8k resistors, 10 mA per mic available,
12 V T-Power - through 180 ohm resistors, 10 mA per mic available
Mic/Line Input Limiters Affects the output of the mic preamps only ('Trim' stage),
+18 dBu threshold, 20:1 limiting ratio,
1 mS attack time, 200 mS release time.