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Unidirectional Condenser Boundary Microphone

  • Designed for surface-mount applications such as high-quality sound reinforcement, professionalrecording, television, conferencing and other demanding sound pickup situations.
  • UniGuardTM RFI-shielding technology offers outstanding rejection of radio frequencyinterference(RFI).
  • Superior off-axis rejection for maximum gain before feedback.
  • Small-diameter UniPoint capsule near boundary eliminates phase distortion and delivers clear, high-output performance.
  • Heavy die-cast case and non-silp silicon foam bottom pads minimize coupling of surface vibration to the microphone.
  • Low-profile design with low-reflectance finish for minimum visibility.
  • AT871UG has contained electronics eliminate need for external power module.
  • The AT871UG requires 9V to 52V phantom power for operation only.

    • audio technica AT871UG
    • audio technica AT871UG
  • AT871UG Specifications


    Fixed-charge back plate, permanently polarized condenser

    Polar Pattern

    Half-cardioid (cardioid in hemisphere above mounting surface)

    Frequency Response

    30 ~ 20,000 Hz

    Open Circuit Sensitivity

    -34 dB(19.9mV) re 1V at 1Pa


    200 Ω

    Maximum Input Sound Level

    130 dB SPL (1KHz,THD 1%)

    Dynamic Range (Typical)

    103 dB, 1 kHz at Max SPL

    Signal-To-Noise Ratio

    67 dB, 1 kHz at 1Pa

    Phantom Power

    415 g


    17.0mm x 145.0mm x 120.0mm (H x W x D)




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

    Accessories Furnished

    Soft protective pouch


    audio technica support 414_1_AT871UG.pdf - Operation Manual