SCM820 8-Channel Digital IntelliMix Automatic Mixer

Designed for use in speech applications, including sound reinforcement, broadcasting and audio recording.

  • Provides networking capabilities, comprehensive software control, AMX and Crestron compatibility, and analog / digital connectivity between devices
  • Offers IntelliMix® technology and digital feedback reduction
  • Features 8 active-balanced microphone or line-level inputs and 8 dedicated, impedance-balanced direct outputs
  • Includes SCM820, hardware kit, ethernet cable, power cable, USB flash drive, and user guide

Product Details

Designed for use in speech applications including sound reinforcement, broadcasting, and recording, the SCM820 uses IntelliMix® technology to dramatically improve audio quality when many channels of microphones need to operate simultaneously.

Multiple I/O configurations and networking options ensure analog and digital connectivity between devices.


IntelliMix Technology

  • Delivers seamless automatic mixing and reduced background noise through dynamic channel gating and attenuation
  • NAT (Noise Adaptive Threshold) continuously adjusts the activation threshold for opening a channel
  • Number of Open Microphones Attenuation (NOMA) determines the amount of gain attenuation for a mix output when the number of active microphones changes
  • Last Mic Lock-On (LMLO) keeps the most recently activated microphone open until another microphone is activated
  • MaxBus ensures that only one channel is opened per sound source, reducing comb filtering for clear and intelligible speech
  • IntelliMix Modes offer five different mixer mode presets of reliable automixing styles (Classic, Smooth, Extreme, Custom, or Manual) to quickly tailor the mix for a particular application

Enhanced I/O support for greater application flexibility and digital connectivity

  • DB25 or logic-enabled block connector models available, each with 8 inputs
  • Per-channel direct outputs allow the SCM820 to be used as an insert processor
  • Mix A and B outputs with selectable mic or line level connect to a sound reinforcement system, mixing console, or recording device
  • Dual mixer operation enables routing of independent automixes to the mix A and B outputs, allowing two entirely different mixes to result from the same set of inputs
  • Aux inputs on both the front and back panel easily connect to media players
  • ¼" (6.35 mm) stereo headphone output for channel solo and mix monitoring

Comprehensive Control

  • Channel control knobs allow quick adjustment of gain, limiter, and EQ settings, and solo/mute functions on input channels
  • Output mix controls and meters enable front-panel master gain and limiter control as well as signal monitoring
  • LED meter rings display input audio or IntelliMix gain levels for each channel
  • Browser-based control software delivers comprehensive software control, monitoring, routing, and configuration of all signals and settings and adds a parametric 8-band EQ

Advanced Networking

  • Standard Ethernet or Dante™ digital networked audio configurations available
  • Dante-equipped models enable multi-channel audio networking over Ethernet
  • Dante upgrade card available for standard Ethernet models
  • Dante virtual soundcard license included to connect a computer to a Dante network for recording, playback, and internet calling between Dante-equipped devices (download Dante virtual soundcard at
  • Link Dante-equipped SCM820 mixers to form large automixes of up to 12 units (96 channels of audio)
  • Control system compatible (AMX, Crestron)
Digital Feedback Reduction
  • Two channels of patented Shure DFR (Digital Feedback Reduction) 
  • Assignable to input channels and mix outputs 
  • Automatic feedback detection and filter deployment 
  • Up to 16 filters per channel 
  • 25 Hz to 20 KHz bandwidth
  • Up to 18 dB gain reduction per filter
  • Selectable low / high Q filter width (1/40th or 1/70th octave)
  • “Freeze” feature that locks depth and frequency of existing filters to avoid unwanted automatic changes
  • Auto-clear on power cycle or timeout that returns filter settings to a pre-defined state for the next event
  • Ability to save current settings to use later or load preexisting setups
    Watch a video demonstration: How To Set Up Digital Feedback Reduction for SCM820

Available Options

SCM820 8-Channel Digital Automatic Mixer, Block Connectors
SCM820-DAN 8-Channel Digital Automatic Mixer, Block Connectors, Dante Digital Audio
SCM820-DB25 8-Channel Digital Automatic Mixer, DB25 Connectors
SCM820-DAN-DB25 8-Channel Digital Automatic Mixer, DB25 Connectors, Dante Digital Audio
  • A820-NIC-DANTE

    A820-NIC-DANTE Dante Digital Audio Upgrade Card

    This upgrade card brings Dante™ digital audio to standard Ethernet versions of the SCM820 automatic mixer.

    from $500.00
  • DB25-TRSM


    Eight-channel DB25 to TRS audio snake for use with SCM820-DB25 models.

    from $149.00
  • DB25-XLRF


    Eight-channel DB25 to XLR female audio snake for use with SCM820-DB25 models.

    from $99.00
  • DB25-XLRM


    Eight-channel DB25 to XLR male audio snake for use with SCM820-DB25 models.

    from $99.00

Software & Downloads


File Language Type File Size
Broadcast & Media Production Brochure English PDF 3.67 mb
SCM820 Digital IntelliMix Automatic Mixer Brochure English PDF 493 kb

CAD Drawings

File Language Type File Size
SCM820 CAD Drawing English ZIP 1.29 mb


File Language Type File Size
SCM820 Signal Flow Diagram PDF 523 kb

Specification Sheets

File Language Type File Size
SCM820 Specification Sheet English PDF 867 kb

User Guides

File Language Type File Size
SCM820 and MXWANI Hardware Kit and Connector Assembly User Guide Bahasa Indonesia, Chinese-Simplified, English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Spanish PDF 979 kb
SCM820 User Guide English PDF 5.74 mb
Shure Web Device Discovery Application User Guide Bahasa Indonesia, Chinese-Simplified, English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Spanish PDF 1.33 mb

Product Support

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