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SmartMixer® Eight-channel Digital Matrix Mixer

U.S. Two-Year Limited End-User Warranty

*Manufacturer's Suggested Retail Price. Actual selling price may vary; please check with an authorized Audio-Technica dealer.

  • Overview
  • Features
  • Specifications
  • Downloads
  • Reviews
  • Q & A

  • Overview

    The AT-DMM828 SmartMixer® latest addition to Audio-Technica’s family of automatic mixers. This digital automatic 8 channel matrix mixer is designed to provide automatic mixing functions for installed sound, house of worship, broadcast and conference applications. Engineered with intuitive, easy-to-use software GUI, the AT-DMM828 automatically keeps the number of open microphones to a minimum, bringing background noise and feedback under control and providing increased clarity and audio quality.
  • Features

    • Eight balanced inputs allow use with both mic- and line-level signals
      Each input provides:
      -Phantom power (48V), individually selectable
      -Individual gain and volume controls
      -Gate attenuation (adjustable)
      -Low-cut filter (individually selectable via SmartMixer Software)

    • RS232 and USB data ports provide a connection point for a PC with included SmartMixer Software

    • Compatible with Crestron® and AMX® systems

    • External control capability enables the SmartMixer to activate other devices
      Force-On – allows an external contact closure to force its associated input to turn on
      Force-Off – allows an external contact closure to force its associated input to turn off
      VCA Control – Volume up/down

    • Selectable NOMA (Number of Open Mics Attenuated) circuitry helps control feedback

    • Priority pre-select feature allows priority of each microphone to be independently assigned

    • Last Mic On selectable for continuous room ambiance

    • Linking capability for 16 units (up to 128 channels)

    • Equipped with eight balanced audio outputs to drive amplification systems or other equipment

    • Detailed settings controlled through SmartMixer Software

    • Mounts in a single 19" rack space via integral rack mount

  • Specifications

    Input Impedance Mic Level: 6600 ohms
    Line Level: 8500 ohms
    Output Impedance Balanced: 200 ohms
    Maximum Input Level -42 dBu (gain at Max)
    Maximum Output Level 24 dBm (THD+N at 1%)
    Maximum Gain 64 dB
    Frequency Response 20 to 20K Hz (±3 dB)
    Equivalent Input Noise -120 dBu*
    Microphone Phantom Power +48V DC
    Control Voltage Out 3.3V DC
    Power Supply 100/240V AC (auto-select), 50/60 Hz, 20W
    Operating Temperature 32° to 104° F (0° to 40° C)
    Dimensions 18.98" (482 mm) W x
    9.05" (230 mm) D x
    1.75" (44 mm) H
    (not including feet, knobs and connectors)
    Weight 5 lbs. 5 oz (2.4 kg)

    * Input terminated with 150 ohms, A-Weighted using Audio-Precision System Two.

  • Downloads

    AT-DMM828 Manual (pdf 2.63 M)
  • Reviews

  • Q & A

    What is the max input level with gain set at minimum? Specifying the full range of input levels would be more useful.


    Thank you for your inquiry. With the attenuation set at 0 and the gain set at minimum the max input level is -17 dBu. With the attenuation set at 30 dB the max input level is +13dBu.


    software works on mac/pc? what operating systems? what is the connecting cables for the mic/line connections? I don't see either on the pic of the back of the unit. thank you.


    Thank you for your inquiry. The software will install and run only on Windows based systems only. The connection between the PC and the mixer is via USB. The inputs and outputs are Phoenix connectors.