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SOUND DEVICES PORTABLE MIXERS - With integrated recorders

Sound Devices field mixers have been designed with the flexibility of both mixing and recording at broadcast quality on location. Compact and lightweight structure along with power efficiency and durability are features Sound Devices incorporate into their designs.


This five-channel location mixer has a wide range of analogue and digital connectivity along with on-board recorder for stand-alone use. Recorded files are broadcast wave-compatible WAV or MP3, on removable SD/SDHC memory cards. 552 mixes five microphone or line inputs to two outputs. Both analogue and digital outputs are available. Each input channel has a direct output, selectable pre- or post-fade. Channel fader, input gain and high-pass filter sweep-frequency are all adjustable with dedicated, conventional rotary controls, per-channel. The mixer has two stereo returns and flexible headphone monitoring options. The digital outputs can be synchronised to external word clock, and the recorded files are time-stamped either to the internal calendar/clock, or an external time-code source. A voice-prompt system in the headphone outputs assist menu and setup navigation without recourse to the visual display.

All controls are on the front panel. For each input, there is a large, rotary, channel-fader, rotary controls for input gain, hi-pass filter frequency, 80Hz to 240Hz, 6 or 12dB/octave, pan, and a soft-latching PFL switch. All channels have a tri-colour LED for signal presence / limiter action / overload and a blue LED indicating line input selection. Other blue LEDs indicate phantom power (12 or 48V), MS pairing mode, stereo pairing mode and phase-reverse (not all are per-channel). The master section has rotary controls for master output level, headphone source selection and headphone level, and switches for limiter in/out, stereo return PFL, line-up tone / slate microphone, and power on/off. A check button displays internal and external battery voltages and announces current date, time and unused memory. A miniature four-way cursor button controls the integral recorder, combining record/stop/play/fast forward/rewind functions. A dual, 21-segment LED bar-graph meters left and right outputs; a Zoom mode, selected by a push function of the headphone source selector, increases resolution in the 0 to 20dBu range. The meter incorporates LEDs indicating output limiter activity. The meters also act as the display for all menu and setup functions. Other LEDs indicate selection of meter Zoom mode, valid time code input, active AES3 output, record mode (tri-colour), slate or tone active, power (tri-colour), stereo return signal presence / clip / monitor selected (tri-colour) and headphone clipping.

There are five XLRs for balanced microphone or line-level inputs and five TA3 connectors for balanced direct outputs. All other connections, including two XLRs for balanced analogue master outputs, which may be menu-selected as AES3 digital outputs instead, are located on the right panel. Both 6.35mm and 3.5mm 3-pole headphone jack sockets are provided. A duplicate balanced analogue master output is available on TA3 connectors (remain active if XLRs are set to AES3) and an unbalanced mono microphone mix output (for IFB transmitters, etc.) is provided on a 3.5mm 2-pole jack socket. A low-level unbalanced version of the master output 'Tape Out' is available on both a TA3 connector and a 3.5mm 3-pole stereo jack socket. A 10-pin Hirose connector provides a further, transformer-isolated, balanced master analogue output and Stereo Return A input (unbalanced). This connector may be selected to output various pre- or post-fade per-channel feeds in AES3 digital format if wished. Stereo return B input has a dedicated TA3 connector, and doubles as the time code input. There are multi-pin connectors for external power connection and linking to additional Sound Devices mixers. A set of four 3-position slide switches set the analogue output levels at the XLR and 10-pin connectors.

Microphone inputs: 0dBu maximum input level, 2000 ohms, transformer-balanced. Gain range 22dB to 72dB (trim), off to 15dB (fader). Line inputs: +40dBu maximum input level, 16000 ohms, otherwise as microphone inputs. Stereo return inputs: +24dBu maximum input level, 20000 ohms, unbalanced. Line outputs: +20dBu maximum level, 85 ohms, at the +4dBu setting; +6dBu maximum level, 3200 ohms, at the -10dBu setting; -20dBu, 150 ohms, maximum level at the microphone level setting; all transformer-balanced. Headphone outputs: 50 ohms. Mono microphone output: +6dBu maximum level, 150 ohms. Digital outputs: AES3-compliant, 100 ohms, balanced. Response: 20Hz-50kHz, +/-0.5dB; Distortion: 0.09% THD + Noise, 50Hz-20kHz, fader full, relative to +18dBu output. File formats: 2-track poly WAV, 16 or 24-bit, 44.1, 48, 88.2, 96kHz sample frequency; 2-track poly MP3 at 64, 128, 192, 320kbps. Power source: 4 x AA (LR6) batteries, Lithium or NiMH rechargeable, or alkaline; 5-18V DC external supply. Dimensions: 279 x 168 x 53mm (W x D x H). Weight: 2kg without batteries.

Required accessories: AA batteries, Lithium, NiMH or alkaline, SD or SDHC memory cards.

Optional accessories: XL-WPH3 DC power supply. For cable sets and other accessories, please see Sound Devices Accessories.


A six-input mixer and compact 10-track field recorder with 23.976, 24, 25, 29.97DF, 29.97ND, 30DF, 30ND timecode frame rates – supporting off, Rec Run, Free Run, 24h Run, and external modes. Recorded files are broadcast wave-compatible WAV or MP3, to removable SD/CF memory cards. The user can employ Dugan and MixAssist auto-mixing between up to six of the available input channels - particularly useful for teleconferencing, video trucks and theatre applications. Operation can be aided via the remote Wingman app for iOS or android bases smartphones or tablets, when used with the optional WM-Connect Bluetooth smart USB accessory.

The front facing panel of the 633 has large rotary controllers for input channels 1-3, mini-rotary controllers for input channels 4-6, and both trim and pan controllers for channels 1-3. Trim and pan control for inputs 4-6 can be achieved via their respective input setting menu options. PFL toggle switches allow the use of PFL for all input channels, whilst individual LEDs illuminate to show the input activity of all channels. An LCD display positioned to the right side of the front facing panel shows a variety of displays including input, output, transport and menu options. Transport control, meters button – to cycle between meter views; rotary encoder for selections, headphone encoder, and menu buttons are positioned either side of the screen. Main power switch is position to the upper right side, along with timecode and power on LED indicators. Slate LED, headphone clipping LED, mic/tone toggle switch, and rtn/fav toggle switch are positioned under the LCD screen.

The left side of the unit houses three active-balanced XLR input connectors – input one can also be used for AES3 or AES42 input signals; three active-balanced TA3 line level inputs, unbalanced 3.5mm TRS multipurpose connection, and access to the battery compartment which holds six alkaline AA batteries or NiMH rechargeable cells. The right side of the 633 has a USB-B connector for keyboard connection (when used with adaptor), compact flash slot, SD card slot, 2x balanced line/mic level main outputs, 10-18V DC power input, timecode I/O on 5-pin Lemo connector, 6.35mm TRS jack headphone output, and 2x transformer-balanced 3-pin XLR outputs for main audio output. The main outputs can also be set to send AES3 digital output signals.

Main inputs: 0dBu, mic; +40dBu, line; +24dBu, 3.5mm jack RTN. Equivalent input noise: -126dBu maximum, 22Hz-22kHz bandwidth with trim controller fully up. Frequency response: 10Hz-40kHz, +/-0.5dB, -3dB at 65kHz. Pre-fade input limiters: +16dBu fixed threshold, inputs 1-3; +4 to +18dBu adjustable threshold. Limiting ratio: 20:1. Attack time: 1mS. Release time: 500mS. High pass filters: 80-240Hz sweepable, 12dB/oct at 80Hz, 6dB/octave at 240Hz. Digital inputs: AES3, balanced 110ohm; AES42, +10V digital phantom power. Post-fade digital limiting: +4dBu to +18dBu adjustable. Output impedance: 100ohms, line; 2.3k ohms, -10; 150ohms, mic; 1k ohms, TA3 mic/line; 100ohms, X3/X4 3.5mm; 100ohms, headphones. Maximum gain (3-pin XLR, line): 91dB, mic; 51dB line. Maximum gain (3-pin XLR, -10): 77dB, mic; 37dB, line. Maximum gain (3-pin XLR, mic): 51dB, mic; 11dB, line. Headphone gain: 107dB, mic input; 67dB, line input; 5dB, RTN. Sampling frequency: 44.1/47.952/48/48.048/88.2/96/192kHz. A/D: 24-bit. A/D dynamic range: 114dB, A-weighted typical. Input delay: -30mS adjustable in 0.1mS steps. Output delay: -10frames for each output in 0.1 frame steps. Dimensions: 56 x 238 x 143mm (H x W x D). Weight: 1kg, without batteries.


This kit comprises of 633 mixer, CS-633 bag, 3x XL-2F female TA3 to female XLR cable, 2x XL-2 female TA3 to male XLR cable, 1x XL-LB2 5-pin Lemo to BNC input and BNC output cable, 2x XL-B2 7.4V lithium ion battery cells, 1x approved compact flash card, 1x approved SD card.

  Description Price (£) Add to basket
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SOUND DEVICES 552 MIXER WITH PORTABLE RECORDER SD card, 5x mic/line in, direct, stereo, AES outs   Stock code: 93-532
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SOUND DEVICES 633 PORTABLE MIXER Digital, 6-input, 10-track recorder, timecode, auto-mixing   Stock code: 79-2204
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SOUND DEVICES 633KIT PORTABLE MIXER With accessory pack   Stock code: 79-2205
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SOUND DEVICES XL-WPH3 POWER SUPPLY Inline, 12V, 100-240V AC, for 442/302/MixPre/7-Series   Stock code: 79-2247
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