Sound Devices 633 6-Input Compact Field Mixer

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The Sound Devices 633 6-Input Field Production Mixer and Digital Recorder is designed for production audio mixing and recording on set and in the field. The unit is housed in a compact lightweight molded metalized carbon-fiber chassis and features six analog inputs: three XLR microphone preamplifier inputs with selectable phantom power, high-pass filters, input limiters, faders and variable pans, as well as three line-level TA3 (mini-XLR) inputs. The first XLR input can also function as an AES digital input and accept AES3 or AES42 inputs with +10 V phantom power for digital microphones. The two XLR outputs can also be used as four channels of AES output.

All of the unit’s inputs can be assigned to the mixer’s six output buses: left, right, Aux 1, Aux 2, Aux 3, and Aux 4. Selectable input delay on all six inputs and output bus delay on all six buses makes it easy to correct lip-syncing issues between audio and video. The unit’s 1/4″ headphone output can be configured with different user-presets and a favorite mode allows for quick source selection when monitoring.

The device can record to an SD card, CompactFlash card, or both memory card formats simultaneously in mono or poly WAV or MP3 file formats. The cards can be set to record redundant backups or combinations of WAV and time-coded MP3s for dailies and transcription purposes. The six inputs, output bus left, output bus right, aux 1, and aux 2 can all be recorded to individual tracks at 24-bit 48 kHz resolution for a total of ten tracks. This is useful for having both individual tracks from the six inputs, as well as the recordist’s field mix. Up to six tracks can be recorded at 24-bit 96 kHz and 192 kHz sample rates.

The device can be powered by any of four different simultaneously coexistent power sources, including 12 to 18 VDC from an external power supply (sold separately), two removable 7.2 V L-type lithium-ion batteries (sold separately), and six internal AA batteries (NiMH recommended, sold separately). The unit’s LCD display indicates battery levels for the various sources. When one power supply is depleted, the mixer will automatically switch to the next power supply without interruption. When all power supplies are depleted, the device’s built-in PowerSafe trickle-charge battery will keep the device running for an additional 10 seconds so that all files can be saved and closed properly and ensure that no data is lost. The built-in battery also allows the device to power up and start recording in two seconds for near immediate operation.

The unit is built with dedicated ergonomic controls for all major mixing and recording functions and features an LCD display that can be viewed in all types of lighting. The background of the display can be changed in the menu settings between day and night modes to make the meters easier to read. An integrated high-accuracy Timecode generator supports all common rates and modes. A USB port allows for the connection of a computer keyboard for easy entering of metadata to better organize files. The unit is built to be durable in the field, and includes gasket seals to protect the internal circuitry from the elements.

Features three high-bandwidth mic/line XLR inputs with selectable phantom power, high-pass filter, input limiter, and variable pan as well as three line-level TA3 connectors
Includes six assignable output buses
Lightweight Chassis
Utilizes a molded carbon-fiber chassis to significantly reduce the overall weight of the unit
AES Digital I/O
Accepts AES3 and AES42 inputs with +10 V phantom power for digital microphones on XLR input 1, as well as up to four channels of AES output on XLR outputs 1 and 2
Internal Slate Microphone
Allows verbal recording of the scene and take number
Records up to 10 individual mono or polyphonic WAV or MP3 tracks at up to 24-bit 48 kHz resolution (6 tracks at up to 96 or 192 kHz sample rates) onto SD and CompactFlash memory cards
Quad Power
Utilizes external 12 to 18 V power supply, two removable 7.2 V L-type lithium-ion batteries, and six internal AA batteries to provide redundant power once each source is depleted
PowerSafe Technology
Utilizes built-in battery to keep the device running for additional 10 seconds after all power sources are depleted so that files may be closed properly and ensure that no data is lost or corrupted
Turns on in approximately two seconds for near instantaneous recording
Control Interface
Features large LCD display that can be viewed in all lighting conditions and combination push-button knobs for menu navigation
Integrated Timecode
Utilizes high-accuracy Timecode generator that supports all common rates and modes
Allows selectable input and output bus delay on all six inputs and all six outputs for syncing audio and video
Headphone Presets
Allows easy switching between user-configurable presets and headphone favorite mode for monitoring different sources
Metadata Entry
Enables USB computer keyboard entry of recording metadata such as notes
Housed in a molded metalized carbon-fiber chassis with gasket seals to protect against the elements

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