Audio-Technica U891RBO Omnidirectional Condenser Boundary Microphone with Switch, RGB LED & Integral Power Module, Phantom Power Only, Black

SKU: ATU891RBO MFR: U891RBO
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Key Features

  • Capture pristine audio with this omnidirectional condenser boundary microphone.
  • Enjoy superior sound quality with a wide 20-20,000 Hz frequency response.
  • Ideal boundary microphone for clear conference calls and meeting recordings.
  • Customize switch functions with touch on/off and momentary settings.
  • Low-noise performance ensures clear recordings with a high signal-to-noise ratio.
  • Use the U891RBO for surface-mounted audio in security or surveillance setups.
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Special Order?Estimated to Ship: 08/20/2025
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Audio-Technica U891RBO Specifications

  • Color

    Black

  • Element

    Fixed-charge back plate, permanently polarized condenser

  • Polar Pattern

    Omnidirectional

  • Frequency Response

    20-20,000 Hz

  • Low Frequency Roll-Off

    80 Hz, 18 dB/octave

  • Open Circuit Sensitivity

    -31 dB (28.2 mV) re 1V at 1 Pa

  • Impedance

    50 ohms

  • Maximum Input Sound Level

    128 dB SPL, 1 kHz at 1% T.H.D.

  • Dynamic Range (Typical)

    107 dB, 1 kHz at Max SPL

  • Signal-To-Noise Ratio

    73 dB, 1 kHz at 1 Pa, A-weighted

  • Phantom Power Requirements

    11-52V DC, 9.3 mA

  • Switches

    Activation: on/off
    Switch function: touch on/off, momentary on, momentary off,
    LED Color: mic on, mic off
    Flat, roll-off

  • Output Connector

    Microphone: TB3M-type
    Cable: 3-pin XLRM-type

  • Cable (L x Diameter)

    25.0' x 0.13" (7.6m x 3.2mm), 2-conductor, shielded cable with TA3F and XLRM connectors

  • Optional Interchangeable Elements

    UE-C cardioid (120 Degree )
    UE-H hypercardioid (100 Degree )

  • Accessory Furnished

    Soft protective pouch

  • Dimensions (H x W x D)

    0.91 x 3.30 x 4.25" (23.0 x 83.9 x 108mm)

  • Weight

    8.9 oz (253g)

  • UPC Code

    4961310146672

About Audio-Technica U891RBO

Experience superior sound quality and flexible control with the U891RBO Omnidirectional Condenser Boundary Microphone. This high-quality, professional-grade microphone is specifically designed for conference and boardroom installations, offering unparalleled versatility and performance.

The U891RBO features a touch-sensitive capacitive-type user switch, which can be set to three distinct modes: touch on/off, touch to talk, and touch to mute. This innovative feature allows for easy and intuitive control, enhancing your audio recording experience.

Powered by phantom power, this durable microphone is equipped with a unique PivotPoint rotating output connector, providing flexibility in positioning and setup. The two-state RGB LED status indicator ensures you're always aware of the microphone's operational status.

The U891RBO microphone is fortified with UniGuard innovations, offering unsurpassed immunity from radio frequency interference. This ensures clean, clear audio capture, free from unwanted noise and disruptions. For further customization, additional interchangeable elements are available separately in cardioid and hypercardioid polar patterns.

An 80 Hz low-cut UniSteep filter is integrated into the microphone, effectively reducing the pickup of low-frequency ambient noise. This feature ensures your recordings are crisp and clear, focusing on the intended audio source.

The microphone's heavy die-cast case and silicon foam bottom pads minimize coupling of surface vibration to the microphone, ensuring stable and consistent audio capture. Threaded inserts on the bottom of the microphone allow for secure mounting with screws, adding an extra layer of security.

The U891RBO's self-contained electronics eliminate the need for an external power module, making it a convenient and efficient choice for all your audio recording needs. Crafted by Audio-Technica, a reputable brand in the audio equipment industry, this microphone is a reliable choice for professional audio recording in a variety of settings.

Audio-Technica U891RBO Features

  • Omnidirectional condenser boundary microphone with touch-sensitive capacitive-type user switch
  • Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
  • The capacitive touch switch can be set to any of three operating modes: touch on/off, touch to talk and touch to mute
  • Integral, phantom-powered, two-state RGB LED indicator displays on/off status of microphone
  • Superior off-axis rejection for maximum gain before feedback
  • PivotPoint rotating output connector allows cable to exit from either the rear or the bottom of the microphone
  • Small-diameter UniPoint element near boundary eliminates phase distortion and delivers clear, high-output performance
  • Available interchangeable elements permit angle of acceptance from 100 Degree to 360 Degree
  • UniGuard RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
  • Self-contained electronics eliminate need for external power module
  • Heavy die-cast case and non-slip silicone foam bottom pads minimize coupling of surface vibration to the microphone
  • Low-profile design with low-reflectance finish for minimum visibility
  • Threaded inserts on bottom of microphone allow it to be mounted with screws for increased security

Warranty Information

This product has a limited warranty of 24 months.

Key Features

  • Capture pristine audio with this omnidirectional condenser boundary microphone.
  • Enjoy superior sound quality with a wide 20-20,000 Hz frequency response.
  • Ideal boundary microphone for clear conference calls and meeting recordings.
  • Customize switch functions with touch on/off and momentary settings.
  • Low-noise performance ensures clear recordings with a high signal-to-noise ratio.
  • Use the U891RBO for surface-mounted audio in security or surveillance setups.

What's in the box:

  • U891RBO Omnidirectional Condenser Boundary Microphone (Black)
  • TA3F to XLR Male Microphone Cable (25')
  • Soft Protective Pouch
  • Audio-Technica 2 Year Limited Warranty