Sound Devices 633 6-Input Field Production Mixer and Digital Recorder

Analog Inputs Frequency Response

• 10 Hz to 40 kHz ± 0.5 dB, -3 dB @ 65 kHz (192 kHz sampling rate reference 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 Types

• XLR Mic: active-balanced for use with ≤600 ohm mics, 4k ohm actual; 12V or 48V phantom power, 10 mA max
• XLR AES: AES3 or AES42 (10 V power), SRC
• XLR Line: active-balanced for use with ≤2k ohm outputs, 10k ohm actual
• TA3 Line: active-balanced for use with ≤2k ohm outputs, 10k ohm actual
• RTN (3.5 mm): unbalanced stereo for use with ≤2k ohm outputs, 30k ohm actual

Maximum Input Level

• XLR Mic: 0 dBu (0 .78 Vrms)
• XLR Line: +40 dBu (80 Vrms)
• RTN (3 .5 mm): +24 dBu (12 .4 Vrms)

Maximum Gain

• Mic-In-to-Line-Out: 91 dB
• Mic-In-to-Aux-Out, -10 Out: 77 dB
• Line-In-to-Line-Out: 39 dB

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

Analog 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

Digital Input Limiters (Inputs 1-6)

• Post-fader
• +6 dBu to +18 dBu threshold (adjustable) · 20:1 limiting ratio
• 1 mS attack time
• 500 mS release time

Digital Inputs AES42

• AES42 Mode 1, provides +10 V Digital Phantom Power

Analog Outputs Output Type

• XLR Line: Active Balanced for use with ≥600 ohm inputs
• XLR -10: Active Balanced for use with ≥10k ohm inputs
• XLR Mic: Active Balanced for use with ≥600 ohm inputs
• TA3 Active Balanced Mic/Line: pin-2 and 3 driven, for use with ≥3k ohm inputs · X3,X4 (3 .5 mm): Unbalanced, stereo, for use with ≥6k ohm inputs
• Headphones (1/4”): Unbalanced, stereo, for use with 8-2k ohm headphones

Output Impedance (ohms actual)

• XLR and TA3 balanced outputs: 100 ohms at Line setting, 3 .2k ohms at -10 setting, 150 ohms at Mic setting
• TA3 Balanced Outs: 1k ohms at Mic and Line settings · X3,X4 (3 .5 mm): 100 ohms
• Headphones (1/4”): 100 ohms

Line Output Clipping Level (1% THD)

• 20 dBu minimum with 10k load

Maximum Output Level

• Line: +20 dBu (7.8 Vrms)
• -10: +6 dBu (1.5 Vrms)
• Mic: -20 dBu (0.078 Vrms)
• Aux 3/4: +6 dBu (1.5 Vrms)