Digital SmartMixer®


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The ATDM-0604a automatic mixer is ideal for meetings, conferences, soft codec applications, courtroom proceedings, radio and TV broadcasts and other applications involving the use of multiple microphones or other media inputs. Audio-Technica's SmartMixer® technology allows channels to be mixed automatically in gate or gain sharing mode, ensuring consistent, high-quality audio output from all inputs in a setup, without the introduction of feedback, excessive ambient noise, or comb filtering.

Controls and LED indicators on the mixer’s front panel allow users to easily adjust input/output and gain levels, set and recall presets, turn on/off phantom power, low-cut filter, automatic mixing and acoustic echo cancellation (AEC), change IP configuration (Auto or Static), and more. The ATDM-0604a also includes Web Remote functionality, which allows users to handle the aforementioned adjustments from a Windows-based PC, Mac, iOS or Android device, plus make additional changes to the input and output settings, select gate or gain sharing mode when using Smart Mix, and adjust other advanced settings.

The mixer is equipped with six balanced Mic/Line inputs and one unbalanced stereo input, along with two balanced and one unbalanced stereo outputs. Network (Cat5e or better) and USB ports are also included, as are A/B Audio-Technica Link ports that let users connect eight mixers sharing audio buses and SmartMix controls via Cat5e cable for simultaneous use within an expanded setup.

The ATDM-0604a is compatible with the Barco ClickShare Conference.



  • 6 mic/line inputs and 1 unbalanced stereo input
  • 2 balanced outputs and 1 unbalanced stereo output
  • USB audio input/output (1 stereo input, 1 stereo output)
  • Remote LED control of ES954 hanging microphone arrays using the GPO terminal
  • SmartMixer® with selectable gain sharing or gate mode
  • High-performance echo canceler for each input channel
  • Noise cancellation that can be assigned to any output channel
  • Built-in 4-band EQ and compressor/de-esser for each input channel
  • Eight 8-band feedback suppressors that can be assigned to mic/line inputs and any output channel
  • Built-in 12-band PEQ, compressor, and limiter for each output channel
  • Dedicated Audio-Technica LINK terminals are compatible with a wide variety of Audio-Technica LINK-enabled products
  • Audio input/output settings can be configured from the front panel in applications without a computer
  • Advanced settings can be configured using the web browser or Smart Mixer Manager app GUI in applications with a computer
  • IP Protocol-based external remote control

  • Compatible with Barco ClickShare Conference


Maximum Gain 64 dB
Frequency Characteristics 20 Hz to 20 kHz (MIC -16 dBu): +1.0 / -1.0 dB 20 Hz to 20 kHz (MIC -60 dBu): +1.0 / -2.0 dB 20 Hz to 20 kHz (LINE 24 dBu): +1.0 / -1.0 dB 20 Hz to 20 kHz (LINE -40 dBu): +1.0 / -2.0 dB
Dynamic Range 110 dB or higher, A-weighted/ST
S/N Ratio 90 dB or higher, A-weighted/ST
Headroom 20 dB or higher
Input Referred Noise -126 dBu or less, Rs = 150 ohm, DIN
Common-Mode Rejection Ratio 80 dB or higher, 1 kHz
Residual Noise -86 dBu or less, A-weighted
Channel Separation -80 dB or less, 1 kHz unity
Total Harmonic Distortion 0.03% or less, 1 kHz unity
Analog Input MIC 1 to 6 max.: 0 dBu MIC 1 to 6 unity: -40 dBu LINE 1 to 4 max.: +10 dBV LINE 1 to 4 unity: -10 dBV LINE 5 to 6 max.: +24 dBu LINE 5 to 6 unity: +4 dBu / 0 dBV / -10 dBV / -20 dBV ST max.: +10 dBV ST unity: -10 dBV / -20 dBV
Analog Output UNBAL max.: +10 dBV / -13 dBV UNBAL unity: -10 dBV / -33 dBV BAL 1/L, 2/R max.: +24 dBu / +20 dBV / +10 dBV BAL 1/L, 2/R unity: +4 dBu / 0 dBV / -10 dBV
Phantom Power +48V DC
Power Supply 100 to 240 V AC (50/60 Hz)
Power Consumption 17 W
Operating Temperature 0 to 40°C (32 to 104°F)
Operating Humidity Range 25 to 85% (with no condensation)
Dimensions 219.3 mm (8.6") ×346.3 mm (14") ×44 mm (1.7") (W×D×H), including protrusions
Weight 1.89 kg (4.2 lbs)
Finish Front panel: Black with silver lines op/rear/sides: Black
PAD (Attenuation Level) -24 dB
I/O Connector INPUT ST: Euroblock connectors (3-pin) INPUT MIC/LINE 1 to 6: Euroblock connectors (3-pin) OUTPUT UNBAL: Euroblock connectors (3-pin) OUTPUT BAL 1/L, 2/R: Euroblock connectors (3-pin) GPO: Euroblock connectors (3-pin)
Level Indicator SIGNAL/PEAK: 1 point (Red/Yellow/Green) Peak indicate (red): -5 to 0 dB Peak hold time: 2 sec.
Remote Control IP protocol: RJ-45 × 1 pc IP address: (factory default) Communication speed: 100 Mbps
Network IP protocol: RJ-45 × 1 pc
Link I/O Audio-Technica LINK:RJ-45 × 4 pcs Communication speed: 100 Mbps
USB Type B Channel: Stereo input x 1 ch, stereo output x 1 ch (24-bit) Communication speed: High-speed (480 Mbps)
A/D Converter Resolution: 24-bit Dynamic range: 115 dB
D/A Converter Resolution: 24-bit Dynamic range: 115 dB
Accessories Included Euroblock connector × 11, Rack-mount (large, small), Rack-mount screw x 6, Power cable, Rubber foot x 4

Software & Firmware

Visit our downloads page for the most up-to-date software and firmware.

If you require assistance identifying the correct software/firmware or need help with installation then please contact us.