Six input compact digital mixer with integrated 10-track recorder and timecode.


  • Six input compact mixer with integrated 10-track recorder and timecode.
  • Three mic/line inputs on XLR plus three line-only inputs on TA3.
  • L/R output plus four added output buses.
  • AES3/AES42 input and selectable AES3 output.
  • Records broadcast WAV files up to 24-bit @ 192 kHz or MP3 to SD and CF cards.
  • Powered by ext. DC (12-18V), Sony L-type (x2) or 6 AA (LR6) batteries. Features PowerSafe.
  • AES input, two-channel AES3 or AES42, four channels of AES output.
  • Clear, fast, easy to navigate controls and interface; visible in all light conditions, configurable metering and display.
  • Stereo Linking, MS and L/R.
  • Input delay selectable on all six inputs plus output bus delay on all six buses.
  • User-configurable headphone presets plus a headphone favorite mode for quick source selection.

Six-Input 633 Compact Mixer With 10-Track Recorder & Automixing

The 633 is designed for audio professionals requiring go-anywhere portability, without compromising recording or mixing capability. The compact 633 field mixer with integrated 10-track recorder offers six analog inputs, two powerful auto mixers (Dugan and MixAssist™), records to SD and CompactFlash memory cards, and offers PowerSafe and QuickBoot technology.

The 633 offers three high-bandwidth mic/line inputs on XLR connectors (3+3), complete with phantom power, high-pass filter, input limiter and variable pan. Three additional line-level inputs on TA3 (mini-XLR) connectors offer flexibility for more complex productions. All inputs are assignable to its six output buses, left/right plus Aux 1/2/3/4.

All six inputs plus output buses left/right and Aux 1/2 can be recorded to individual tracks. The 633 offers 10-track 24-bit, 48 kHz uncompressed WAV recording (96 kHz and 192 kHz sampling up to six tracks) to SD and CompactFlash memory cards. The two cards can be set independently, recording either identical material for a real-time backup, or combinations of WAV and timecode stamped MP3 files.

The 633 integrates a rock-steady Ambient timecode generator, supporting all common rates and modes. In addition to timecode, the 633 supports extensive file metadata. Metadata is entered from either the front panel or from an attached USB keyboard.

Designed to withstand the extremes of field production, the 633’s small, lightweight, compact chassis is made from molded, metalized carbon fiber. It is built on Sound Devices’ strong heritage of high performance audio mixers, audio recorders, and video recorders.

Powered by a unique Quad Power supply with PowerSafe™ technology, the unit is operational from any of four power sources. Sources can include external DC (12-18 V), two removable 7.2 V L-type lithium ion cells, and six internal AA batteries. The 633 automatically switches from one power supply to the next when power is exhausted or removed. With its combination of power sources, the 633 can operate for a full production day on batteries alone.

When all power sources are removed or depleted, the unit’s PowerSafe™ circuitry is activated. PowerSafe™ keeps the 633 operating for up to 10 seconds and ensures that all file operations are fully closed and the unit gracefully shuts down. Two second power on-to-recording. Never wait on sound!

The 633 offers two powerful, high-performing automatic mixing options, Dugan Automixing and Sound Devices’ MixAssist. The inclusion of these two well-known auto mixers makes it the go-to tool for more portable production applications with automixing for up to six audio channels. Dugan Automixing is widely used in broadcast television applications, in dialogue recording for TV and motion picture production, and in house of worship (HOW) applications. It also is a good choice for teleconferencing, video trucks, and theater applications with multiple wireless microphones on stage. Dugan Automixing takes over the nerve-wracking job of cueing mics in and out, freeing up the location recordist to pay more attention to the actual mix balance.

MixAssist automatically attenuates the level of inputs that are not active and helps maintain consistent background sound levels regardless of the number of open microphones. Comb filtering and phasing artifacts are also reduced when multiple mics pick up the same sound source by inteligently attenuating redundant mics. The end user can define the amount of off-attenuation MixAssist uses.

6-Series Gets a Wingman

Wingman, a wireless remote control option for the 6-Series mixer/recorder line, is a free application that, when paired
with the required WM-Connect Bluetooth® Smart USB accessory, enables clear views of metering and timecode display on the larger screens of Android and iOS mobile devices. With Wingman, Sound Mixers can:

  • View meters, timecode, and frame rate
  • Start and stop recordings
  • Arm, disarm, and name tracks
  • Edit a take’s metadata
  • Circle takes and set False takes
  • Manage, create, and email sound reports

Third-Party Remote Control

The ability to remotely control any 6-Series mixer/recorder (688, 664, and 633) makes for greater convenience and flexibility on set and in the field. With wireless remote control, via iOS and Android mobile devices, Sound Mixers can:

  • Start and stop recordings
  • Arm and name tracks
  • Edit a take’s metadata
  • Circle takes and set False takes
  • View, transmit, and receive timecode
  • Create sound reports

Sound Devices 6-Series mixer/recorders support third-party solutions including Ambient™ Recording (along with Lockit Network GmBH) and Timecode Systems (with PureBlend Software) (firmware 3.10 or later). If you have questions about the necessary equipment for either solution, click HERE. For questions on pricing and where to purchase gear/software from either Timecode Systems, Ambient, or PureBlend Software, please contact them directly.

2 Year Warranty

One-year standard warranty turns into two-years upon registration. Click Here for more information.

What’s in the box:

  • 633 Compact Mixer and Recorder
  • USB Cable (USB Standard A to USB Standard B)
  • USB Adapter (USB Standard A Female to Female)
  • LCD Protective Cover
  • 4 Adhesive Rubber “Bumpers”
  • 3 Colored Dot Stickers


Click on each group to expand. Specifications are subject to change without prior notice.

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 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 Inputs
  • Input Types
    • XLR AES: AES3 or AES42 (10 V power), SRC
  • 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
  • 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)
  • Output Limiters
    • Affects the outputs of the mixer
    • Threshold selectable from +4 dBu to +18 dBu, 1 dB steps · 20:1 limiting ratio
    • 1 mS attack time
    • 500 mS release time
  • Maximum Gain
    • Typical (Trim, Fader, Master, Phones, RTN fully up)
  • Maximum Gain – Mic Level
    • Master Outs (XLR) @ LINE 91 dB
    • Master Outs (XLR) @ -10 77 dB
    • Master Outs (XLR) @ MIC 51 dB
    • X3, X4 Outs (3 .5 mm) 77 dB
    • Headphones (1/4”) 107 dB
  • Maximum Gain – Line Level
    • Master Outs (XLR) @ LINE 51 dB
    • Master Outs (XLR) @ -10 37 dB
    • Master Outs (XLR) @ MIC 11 dB
    • X3, X4 Outs (3 .5 mm) 37 dB
    • Headphones (1/4”) 67 dB
  • Maximum Gain – Return
    • Headphones (1/4”) 5dB

Digital Outputs
  • AES3 Output
    • Transformer-balanced AES Out A,B on XLR
    • 110 ohm, 2 V p-p, AES and S/PDIF compatible with RCA adaptor

  • Sampling Frequency
    • 44.1 kHz
    • 47.952 kHz
    • 48 kHz
    • 48.048 kHz
    • 88.2 kHz
    • 96 kHz
    • 192 kHz
  • A/D
    • 24 bit
  • A/D Dynamic Range
    • 114 dB, A-weighted, typical
  • Recording Storage Type
    • SD, SDXC, SDHC Card
    • FAT32 or exFAT formatted, will format media on-board
    • CompactFlash (CF)
    • FAT32 formatted for CF and SD 32 GB, will format memory cards in-unit
  • File Type
    • Record: WAV (Broadcast Wave File format), polyphonic or MP3
    • Playback: WAV (Broadcast Wave File format), polyphonic or MP3

Timecode and Sync
  • Modes Supported: off, Rec Run, Free Run, 24h Run, External
  • Frame Rates: 23.976, 24, 25, 29.97DF, 29.97ND, 30DF, 30ND
  • Accuracy: Ambient generator, 0.2 ppm (0.5 frame in 24 hr)
  • Time Code Input: 20k ohm impedance, 0.3 V – 3.0 V p-p (-17 dBu – +3 dBu)
  • Time Code Output: 1k ohm impedance, 3.0V p-p (+3 dBu)
  • Sample/Timecode Accuracy
    • ± 0.2 ppm (0.5 frames per 24 hours)

  • External: 10-18 V on locking 4-pin Hirose connector, pin-4 = (+), pin-1 = (-).
  • Removable x 2: 7.2 V (nominal) Sony L-type Li-ion, operational from 6.5–8.5 V,
  • Internal: accepts 6 AA-sized (LR6) batteries, 1.2-1.6 V nominal (NiMH rechargeable compatible)

  • Operating: -20°C to 60°C, 0 to 90% relative humidity; (non-condensing)
  • Storage: -40°C to 85°C

Dimensions and Weight
  • Dimensions: 6 cm x 24 cm x 14 cm (H x W x D); 2.2” x 9.4” x 5.6”
  • Weight: 1.1 kg; 2 lbs. 9 oz. (unpackaged, without batteries)


Featured Articles

Approved Media – 6 Series

Sound Devices extensively tests removable recording media with the 633, 664, and 688. For best media performance, Sound Devices recommends occasionally performing a full reformat of an SD card per the “Overwrite Format” method from the SD Association. The Overwrite Format deletes file/directory entries by initializing file system parameters of the card (same as with Quick Format), and erases all […]

Read Full Article

6-Series Limiters and Indicators

Sound Devices products are typically used for location recording of film, television, and broadcast audio.

Read Full Article

Requirements for Remote Control of 6-Series

Through collaboration with third-party companies—Ambient Recording & Lockit Network GmbH, and Timecode Systems & PureBlend Software—Sound Devices supports wireless remote control of any 6-Series mixer (688, 664, and 633) via web-based and iOS mobile devices. Remote control of the mixers is also supported by connecting these systems to the Sound Devices CL-12 liner fader controller. […]

Read Full Article

Product Registration

Extend your one year warranty to a two year warranty by registering.
Register Now

Repair Request

Request service from one of our authorized technicians.
Request a Repair

Contact Support

Have a question for our support team? We are here to help.
Contact Support


Latest Firmware: 633 Firmware v4.61
Released: January 08, 2020


  • Improved SD Card write performance
  • Various system enhancements and improvements.

In Action

David Silberberg

Read Article

Jeff Deeth

Read Article

Chris Duesterdiek, CAS

Read Article

Brendan Beebe, CAS

Read Article

Dan Slater

Read Article

Kally Williams

Read Article