SmartMixer® Four-channel Automatic Mixer


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SmartMixer® Four-channel Automatic Mixer


The AT-MX341b automatic mixer is ideal for meetings, seminars, teleconferencing, worship services, radio and TV broadcasting and A/V applications. All switching is under microprocessor control with proprietary algorithms for instant, seamless operation. An individual priority pre-select switch for each mic/line channel allows choice of one-channel-at-a-time operation, all channels active, or any mix of moderator override. The last microphone on stays on so that ambient sound is never muted. Plus, any number of SmartMixers can be linked to create a system for large multi-mic installations. The priority control system extends throughout the entire chain.

  • Four Mic/Line inputs with individual priority pre-select switch for each channel
  • Balanced inputs and output are individually switchable between mic and line-level
  • Single threshold setting for all channels
  • Individual gain controls for each channel
  • Switchable manual mode overrides automatic functions
  • Master output level control
  • TTL logic output signals available to control speaker or camera switching, tally lights, etc.
  • 12V phantom power individually selectable for each channel
  • Off attenuation for each input adjustable to -20 dB
  • Output level meter with Peak and RMS modes
  • Mounts in a single 19" half-rack space
  • Includes rack mount adapters


Input Impedance Mic 4 kΩ, Line 30 kΩ
Output Impedance Mic 320 Ω, Line 200 Ω
Maximum Input Level Mic -20 dBV, Line +30 dBV
Maximum Output Level Mic -40dBm (600 Ω), Line +14 dBm (600 Ω)
Nominal Output Level (0VU) Line: +4 dBm (600 ohms), +4.4 dBV (open circuit) Mic: -46 dBm (600 ohms), -44 dBV (open circuit)
Maximum Gain ≧ 70 dB
Frequency Response 60 - 30,000 Hz @ -3dB points
Equivalent Input Noise - 120 dBV (150 Ω) at maximum gain
Input Attenuation 10 dB
Mic/Line Input Pads 50 dB
Microphone Phantom Power +12 V DC
Control Voltage Out +4 V DC
Power Supply 12 V AC or 15-18 V DC, either polarity, 150 mA minimum
Operating Temperature 0 - 40 ºC
Dimensions 210 x 327 x 44mm (WDH - including feet, knobs and connectors)
Weight 1.4 kg
Accessories Included System link cable, manual, rack adaptors, AC power supply



AT-MX341B Declaration of Conformity
AT-MX341B SmartMixer Manual