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Audio-Technica U891RCX
Cardioid Condenser Boundary Microphone


A wide range condenser microphone with a cardioid polar pattern, the U891RCx is equipped with local or remote switching options.
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Our Price: $319.00
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Audio-Technica U891RCX
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A wide range condenser microphone with a cardioid polar pattern, the U891RCx is equipped with local or remote switching options. For flexible control in conference and boardroom installations, the unit's external contact closure ability allows a user to trigger an external device - a camera, for instance - from a switch on the microphone. Another ease-of-use feature: the microphone's activation switch can be set to three operating modes: touch-on/touch-off, press to talk, and press to mute. The mic is also equipped with an 80Hz low-cut UniSteep filter to reduce pickup of low-frequency ambient noise. Its red LED status indicator can be controlled remotely. UniGuard innovations offer unsurpassed immunity from radio frequency interference; interchangeable elements are available in cardioid, hypercardioid and omnidirectional polar patterns; a unique rotating PivotPoint connector changes the cable exit point - no tools required. It requires 11 to 52V DC phantom power, which operates the microphone and switch circuitry.


  • Designed for surface-mount applications such as high-quality soundreinforcement, conferencing, distance learning and other demanding soundpickup situations
  • An activation switch can be set to any of three operating modes:"touch-on/touch-off", "touch-to-talk" and "touch-to-mute"
  • External contact closure capability permits control of remote devices frommicrophone switch
  • External LED control allows for accurate depiction of the live status ofthe microphone
  • PivotPoint rotating output connector allows cable to exit from either therear or the bottom of the microphone
  • Small-diameter UniPoint capsule near boundary eliminates phase distortionand delivers clear, high-output performance
  • UniGuard RFI-shielding technology offers outstanding rejection of radiofrequency interference (RFI)
  • Heavy die-cast case and non-slip silicone foam bottom pads minimizecoupling of surface vibration to the microphone
  • Low-profile design with low-reflectance black finish for minimumvisibility
  • Improved switch design


  • Element: Fixed-charge back plate, permanently polarized condenser
  • Polar Pattern: Half-cardioid (cardioid in hemisphere above mountingsurface)
  • Frequency Response: 30-20,000 Hz
  • Low Frequency Roll-Off: 80Hz, 18 dB/octave
  • Open Circuit Sensitivity: -34 dB (19.9 mV) re 1V at 1 Pa
  • Impedance: 200 ohms
  • Maximum Input Sound Level: 130 dB SPL, 1kHz at 1% THD
  • Dynamic Range (typical): 104 dB, 1kHz at Max SPL
  • Signal-To-Noise Ratio: 68dB, 1kHz at 1Pa
  • Phantom Power Requirements: 11-52V DC, 4mA typical
  • Switches:
    Activation: on/off
    Switch Function: Press on/off,momentary on, momentary off
    Control: local, remote, LED remote
  • Weight: 9.4 oz
  • Dimensions (max. L x W x H): 4.25" x 3.31" x 0.91"
  • Output Connector: TB5M-type
  • Cable: 25' long, 0.13" diameter, 5-conductor shielded cable (2 conductorsunder shield; 3 control wires outside shield)
    TA5F-type connector atmicrophone end, output ened stripped and tinned for connection to electronicdevice
  • Optional Interchangeable Elements:
    UE-O omnidirectional (360deg.)
    UE-H hypercardioid (100 deg.)
  • Acessory Furnished: Soft protective pouch

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