divider-line Wired Discussion Unit


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ATUC-50DU Wired Discussion Unit

The ATUC-50DU has a 3-pin XLRF-type input for use with ATUC-M43H, ATUC-M58H and ATUC-M32L microphones. Includes a talk/request-to-talk button, channel/volume display, channel selection buttons, built-in speaker, 3.5 mm (1/8") headphone jack with volume control, two LED indicators, and two RJ-45 ports for daisy-chaining DU/IU/INTs. Designed for tabletop or recessed mounting. For wired or wireless systems.


  • Connect up to 100  discussion units to one control unit
  • Cascade up to 300 discussion units using multiple control units
  • High-quality speaker for enhanced intelligibility
  • Clear LED display for volume control and channel selection
  • Individual Automated Gain Control (AGC), Mic gain and Mic EQ
  • Multicolour LED bar on the DU (rear side)
  • Multicolour LED on the Speak button
  • Uses standard Cat 5 (and above) cabling
  • Connects easily through a daisy chain or ring topology


Discussion Unit
Dynamic Range 107dB A-Weighted
Frequency response +1.0, -2.0dB 20Hz - 20kHz, refer to +4dBu output @1kHz
Sampling Frequency 24bit /48kHz
Signal-to-Noise Ratio 87dB A-Weighted
Connections Inputs: Mic x 1, Outputs: Headphones x 1, CHAIN: DU / CU terminals
Headroom 20dB
Equivalent Input Noise Less than -121dBu Rs=150ohm
Total Harmonic Distortion Less than 0.07% @1kHz unity
Phantom Power DC +24V
Power Supply DC +48V
Power Consumption 2.2W
Operating Temperature Range 0-40℃
Operating Humidity 25-85%
Dimensions 135mm x 148.3mm x 84.2mm
Weight 570g
Accessories Included Quick Setup Guide, Warranty Sheet