SmartMixer® Eight-channel Digital Matrix Mixer


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  • 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


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.


Input Impedance Mic Level 6.6 kΩ, Line level 8.5 kΩ
Output Impedance Balanced: 200 Ω
Maximum Input Level -42 dBu (gain at Max)
Maximum Output Level 24 dBm (THD + N @ 1%)
Maximum Gain 64 dB
Frequency Response 20 - 20,000 Hz (±3 dB)
Equivalent Input Noise -120 dBu (input terminated with 150Ω, A-Weighted using Audio-Precision System Two)
Microphone Phantom Power +48V DC
Control Voltage Out 3.3V DC
Power Supply 100/240 VAC (auto-select), 50-60Hz, 20W
Operating Temperature 0 - 40º C
Dimensions 482 x 230 x 44mm (WDH, not including feet, knobs or connectors)
Weight 2.4 kg



AT-DMM828 Declaration of Conformity