DCN Concentus Chairman Unit
Conference System
DCN Concentus

This stylish and ergonomically designed chairman unit is equipped with all the necessary facilities to enable the user to function as chairman of a conference. Similar in appearance to the LBB 3546/00 Delegate Unit, the LBB 3547/00 Chairman Unit includes a microphone priority button. When pressed, the priority button causes all currently active delegate microphones to be temporarily or permanently switched off, allowing the chairman to take control of the meeting. The chairman unit can also be used to start, stop or suspend voting, cancel requests to speak, turn off all active microphones and recall messages for display. A graphic LCD screen with permanent backlighting can display characters from complex European languages or icon-based scripts such as Chinese. Channel selection is automatically limited to the number of language channels available. The flat panel loudspeaker offers superior acoustics with minimal feedback, so increasing intelligibility. When the unit is not being used, the loudspeaker panel conveniently folds down.

Note: The loudspeaker is not automatically muted when the microphones are connected.

  • Graphic LCD screen with backlighting
  • Chip-card reader
  • Channel selector for accessing interpretations
  • Displays messages and conference-related data
  • Incorporates all functions of LBB 3546/00 Delegate Unit

Features and Benefits

  • Low susceptibility to mobile phones
  • Compact, attractive delegate unit
  • Built-in fold-away flat-panel loudspeaker
  • Five voting buttons
  • Cable connections located underneath the unit
  • External present and fraud contact

Technical Specifications
Electrical Headphone connection
Frequency response 30 Hz – 20 kHz
Load impedance > 32 ohm
Output power 2 x 15 mW/32 ohm
Headset connection
Frequency response 30 Hz – 20 kHz
Load impedance > 32 ohm
Output power 2 x 15 mW/32 ohm
Nominal microphone input level 7 mVrms
Overload microphone input level > 124 mVrms
Interface data
Recommended external microphone type (or headset microphone)
Element Electret-condenser
Polar pattern Omni directional
Operating voltage 5 Vdc
Sensitivity 62 dB at 1200 ohm (0 dB = 1 V/mbar at 1 kHz)
Frequency response 100 Hz to 14 kHz
Connector 3.5 mm (0.14 in) jack mono or stereo
Mounting Tabletop (portable or fixed mounting) and flush mounting
Dimensions (H x W x D) (without microphone) 
Tabletop 50 x 275 x 155 mm (2.0 x 10.8 x 6.1 in)
Flush mounted 30 x 275 x 155 mm (1.2 x 10.8 x 6.1 in)
Weight 1 .4 kg (3.1 lb)
Color top Charcoal (PH 10736) with silver (RAL 9022) panel
Color base Charcoal (PH 10736)

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