Beyerdynamic QUINTA-MU-23

Conference Chairman Microphone Unit

OUR PART #: QUINTA-MU-23 Write the First Review.

The Quinta MU 23 chairman microphone unit is equipped with a clear...
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The Quinta MU 23 chairman microphone unit is equipped with a clear, function and a microphone button in the housing with which the participant can switch his microphone on and off. The chairman microphone unit does not depend on the maximum number of simultaneous open microphones. Unlike the delegate microphone units the chairman microphone unit is not controlled by Automatic Channel Allocation, but has an extra transmitting channel exclusively for the chairman. The ready-to-talk status of the microphone is indicated by the red LED ring around the gooseneck microphone.

Using the clear button all switched-on microphones of the delegate microphone stations are switched off.


  • Direct Sequence Spread Spectrum (DSSS) provides high immunity from interference and unauthorised listening, even when using other radio systems
  • Wireless transmission with integrated True Diversity antenna technology for transmitting and receiving
  • Three selectable frequency bands : 2.4 / 5.2 / 5.8 GHz
  • Automatic or manual silent change to an interference-free freqquency response acc. to EN 3000328 ETSI
  • Automatic recognition of interferences in all frequency ranges
  • Processor-controlled and automatic audio channel allocation of the microphone units
  • Digital 128-bit encryption and additional 24-bit PIN code against unauthorised listening
  • Removable gooseneck microphone with Scudio® technology in different lengths, 5-pin XLR connector with hidden lock
  • Red LED ring around the gooseneck to indicate the ready-to-talk status of the microphone
  • Soft touch silicone buttons with backlit illumination in 3 colours
  • Operating panel with braille made of stainless steel
  • Microphone button to switch the microphone on / off
  • Clear button to switch off all activated delegate stations
  • Programmable function button for different priorities or external controls
  • Voice-controlled activation of the microphone possible
  • High-quality plastic housing with a non-glare matt black coating of Alexit soft-touch paint
  • Integrated loudspeaker with voice equalisation
  • Decreased loudspeaker volume when microphone is switched on
  • Adjustable mini stereo jack output (3.5 mm) as documentation or headphones
  • Parameters can be programmed via the control unit and the appropriate configuration software
  • Automatic Power OFF when the control unit is in the stand-by mode or switched off
  • Power on LED
  • Charging status of the battery can be monitored and transmitted to the control unit
  • Operating control LED indicates the status when the minimum capacity is too low
  • Charging contacts for charging the integrated rechargeable batteries in the charging unit
  • Reliable processor-controlled charging electronics avoids memory effect and ensures immediate use of the microphone units
  • LED ring of the gooseneck microphone indicates the charging status and the power on LED on the rear indicates the use of an external power adapter
  • Maximum charging time of 2.5 hours when the battery (NiMH) is completely empty
  • DC connection for battery recharging or powering via external power adapter
  • Minimum operating time 20 hours


  • Transmitter power: max. 20 dBm per channel and region (average, duty cycle = 30%)*
  • Battery voltage: 8 NiMH cells, 2080 mAh
  • External DC operation: 15 V DC (±0.5 V), residual hum < 20 mV, 950 mA
  • Charging time  with charger: max. 2.5 hours when the battery is completely empty
    with mains charger adapter: max. 2.5 hours when the battery is completely empty
  • Loudspeaker: Wide-band, integrated loudspeaker
  • Volume decrease when Mic On (“Ducking”): 15 dB fixed setting
  • Headphone output: Jack socket (3.5 mm, stereo)
  • Min. impedance: 16 O
  • Power supply: 9.6 V with integrated NiMH battery (8 cells)
  • Operating time depending on the type of the microphone unit: approx. 20 hours in discussion mode, operating time also depends on the volume
  • Temperature range (at < 90% humidity): +10° – +40°C [+50 °F – +104 °F]
  • Storage temperature (at < 90% humidity): -20° – +55°C [-4 °F – +131 °F]
  • Dimensions (without microphone)
      -  Length: 173 mm [6.8"]
      -  Width: 157 mm [6.18"]
      -  Height: 51 mm [2.01"]
      -  Weight: 1.7 kg [3.74 lbs]

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