Beyerdynamic Classis RM 31 RC
Revoluto Vertical Array Microphone with 5-Pin XLRM in Black


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The Beyerdynamic Classis RM 31 RC, part of their Classis RM 31 series, is a desktop microphone that's made for round table discussions, podiums, tele/video conferencing, announcements, and lecterns. It's designed with Revoluto technology offering 5 integrated microphone capsules and provides a "corridor"-type characteristic that ensures a wide range of good voice quality. Within this range, up to two speakers can move freely, i.e. they can stand up or sit down, move their head and move towards or away from the microphone. The microphone is equipped with innovative Scudio technology, making it absolutely insensitive to wireless communication devices such as mobile phones. The RC model's specific features include: 5-pin male XLR connector, phantom power adapter, programmable button (PTT, PTM, ON/OFF) with braille, switchable low-cut filter, switchable LED ring remote control function. 

The Classis RM 31 RC lets you select between the operating modes: ON/OFF, Push-To-Talk, and Push-To-Mute via its programmable button. The button can also be disabled. The microphone's frequency response can be set using a separate switch in 2 stages: Linear, or with low-cut filter for suppressing low-frequency interference. The illuminated ring indicating the microphone status can also be deactivated. Additionally, the Classis RM 31 RC provides the option of external control. Further, when operating the microphone button, an external device can be controlled using the control output. The LED ring displays the microphone's ready-to-talk status.

Beyerdynamic Classis RM 31 RC Features:

  • Horizontal corridor characteristic for picking up two speakers
  • Large speaking distance
  • Large freedom of movement
  • Revoluto technology with vertical microphone array
  • RFI-proof due to Scudio technology
  • High gain before feedback
  • Modern metal housing
  • Quality crafted in Germany

Beyerdynamic Classis RM 31 RC Features:


  • Microphone: Revoluto microphone array, patented
  • Transducer type: Electret condenser
  • Operating principle: Pressure gradient
  • Polar pattern: Corridor
  • Horizontal: Cardioid
  • Vertical: Lobar
  • Optimal distance to the speaker: 40 - 80 cm [15.75" - 31.5"]
  • Frequency response: 90 - 20.000 Hz
  • Sensitivity: 28.5 mV/Pa = -30.9dBV ±2dB
  • Nominal impedance: < 200 Ohms
  • Load impedance: = 1 kOhms
  • Signal-to-noise ratio / noise voltage: 67.2 dB [A] / 12.5 µV [A]
  • Max. SPL: 107 dB [SPL @ 1% THD]
  • Equivalent SPL: 26.8 dB [A]
  • Connector: balanced, with 5-pin male XLR connector
  • Supply voltage / supply current:
    • Phantom power:
      • P48 (+48 VDC ±4 VDC, 6.8 kOhms ±20%, < 9.5 mA)
      • P24 (+24 VDC ±4 VDC, 1.2 kOhms ±20%, < 9.5 mA)
      • P12 (+12 VDC ±1 VDC, 680 Ohms ±20%, < 9.5 mA)


  • Operating Temperature range: 14° F to 104° F (-10° C to +40° C)


  • Housing color: Black
  • Length: 11.81"" (300mm)
  • Capsule: 0.98" (25mm)
  • Weight: 0.41 lbs (186 g)
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