Sound Devices 633 - Manual (Page 73)

Specifications
Analog Inputs
Frequency Response · 10 Hz to 40 kHz ± 0.5 dB, -3dB @ 65 kHz (192 kHz sample rate, re 1 kHz)
THD + Noise · 0.09% max (1 kHz, 22 Hz–22 kHz BW, fader at 0, 0 dBu output)
Equivalent Input Noise · -126 dBu (-128 dBV) maximum. (22 Hz - 22 kHz bandwidth, flat filter, trim control fully
up)
Input Type · XLR-3F Mic: Active-balanced for use with ≤600 ohm mics
· XLR-3F Line: Active-balanced for use with ≤2k ohm outputs
· RTN (3.5 mm): Unbalanced stereo for use with ≤2k ohm outputs
Input Impedance
(ohms actual)
· XLR-3F Mic: 4k ohms
· XLR-3F Line: 10k ohms
· RTN (3.5 mm): 15k ohms
Input Clipping Level · 0 dBu minimum (trim control fully down)
Maximum Input Level · XLR-3F Mic: 0 dBu (0.78 Vrms)
· XLR-3F Line: +40 dBu (80 Vrms)
· RTN (3.5 mm): +24 dBu (12.4 Vrms)
High-Pass Filters Sweepable 80 Hz to 240 Hz, 12 dB/oct at 80 Hz,
6 dB/octave at 240 Hz
Microphone Powering
(each analog Input selectable)
· 12 V Phantom: through 680 ohm resistors, 10 mA per mic available
· 48 V Phantom: through 6.8k resistors, 10 mA per mic available
Pre-Fader Input Limiters
(Inputs 1-3)
· Affects the output of the mic preamps only (‘Trim’ stage)
· +16 dBu threshold (fixed)
· 20:1 limiting ratio
· 1 mS attack time
· 500 mS release time.
Post-Fader Input Limiters
(Inputs 1-6)
· +4 dBu to +18 dBu threshold (adjustable)
· 20:1 limiting ratio
· 1 mS attack time
· 500 mS release time.
Digital Inputs
AES3 · Balanced: 110 ohm
AES42 · AES42 Mode 1, provides +10 V Digital Phantom Power
Post-Fader Digital Limiters · +4 dBu to +18 dBu threshold (adjustable)
· 20:1 limiting ratio
· 1 mS attack time
· 500 mS release time.
Specifications
633 User Guide and Technical Information
67