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Everything In Music Since 1958
Everything In Music Since 1958

Sound Devices 688 12-Input Digital Field Mixer

Out of Stock
Original price $0.00 - Original price $0.00
Original price $0.00
$5,638.80 - $5,638.80
Current price $5,638.80
About Inventory Status

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In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions

Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

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Quality Design - The Sound Devices 688 12-Input Digital Field Mixer

The 688 is a 12-input digital field mixer with 16-track integrated recorder and timecode.

  • The A20-Mini transmitter introduces GainForward, a new feature that eliminates the need to adjust microphone preamplifier gain at the wireless transmitter. Audio levels from the transmitter are controlled either directly at the mixer’s trim control or at the wireless receiver. Read more about GainForward
  • Support for A20-Mini GainForward. When the A10-RX receiving an A20-Mini signal is slotted into the SL-6, the A10-RX Input menu settings are bypassed and all gain, low cut, and limiter activity are performed and controlled by the 688. Trim gain range is 0 to 60 dB for the 688 channel receiving signal from the A20-Mini
  • A10-RX Receiver Setup screens show Limiter, High Pass Filter, and clipping status of the associated 688 channel when receiving signal from the A20-Mini
  • A10-RX Receiver screens now display overload, mute, and record status of A10-TX
  • SuperSlot Receiver Overview screen now shows record status of the A20-Mini and A10-TX


  • 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, fl at fi lter, trim control fully up)
  • Inputs/li>
    • XLR Mic: Active-balanced for use with ≤600 ohm mics, 4k ohm actual; 12V or 48 V phantom power, 10 mA max
    • XLR AES: AES3 or AES 42 (10V power), Sample Rate Converted
    • 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 A, B, C (3.5 mm/10-pin): Unbalanced stereo for use with ≤2k ohm outputs, 6.5k ohm actual
    • Slate Mic (TA3): 6.5k 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 A, B, C (3.5 mm/10-pin): +24 dBu (12.4 Vrms)
  • Pre-Fader Input Limiters (Inputs 1-6)
    • +16 dBu threshold (fi xed), soft knee/hard knee
    • 20:1 limiting ratio
    • 1 mS attack time
    • 500 mS release time

Manufacturer: Sound Devices
Model: 688
SKU: I641771-N-0-WHXX
UPC: 859108005178

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