Omnidirectional Condenser Boundary Microphone

  • Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
  • UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
  • Self-contained electronics eliminate need for external power module
  • Small-diameter capsule near boundary eliminates phase distortion and delivers clear, high-output performance
  • 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

  • U841R Specifications


    Fixed-charge back plate permanently polarized condenser

    Polar Pattern

    Omnidirectional in hemisphere above mounting surface

    Frequency Response

    40 ~ 20,000 Hz

    Open Circuit Sensitivity

    -35 dB (17.7 mV), (0 dB = 1 V/Pa, 1 kHz)


    200 ohms

    Maximum Input Sound Level

    130 dB SPL (1 kHz at 1% THD)

    Dynamic Range (Typical)

    105 dB (1kHz at Max dB SPL)

    Signal-To-Noise Ratio

    69 dB (1 kHz at 1 Pa, A-weighted)

    Phantom Power

    11-52V DC, 2 mA typical


    84 g


    65.0 mm diameter, 15.1 mm height

    Output Connector



    7.6 m long, 3.2 mm diameter, 2-conductor, shielded cable with TA3F and XLRM-type connectors

    Accessories Furnished

    Soft protective pouch


    audio technica support U841R_CG.pdf - U841R Caution Guide
    audio technica support U841R_UM_EN.pdf - U841R User Manual
    audio technica support U841R_UM_TC.pdf - U841R User Manual (Chinese)