No description

Cardioid Condenser Microphone


  • All-purpose condenser microphone ideal for interviews, voice-overs, air studio and general audio acquisition
  • Cardioid polar pattern reduces pickup of sounds from the sides and rear, improving isolation of desired sound source
  • Switchable 80 Hz high-pass filter minimizes pickup of undesired low-frequency sounds
  • Large protective screen reduces “popping” and sibilant distortion
  • Operates on battery or phantom power

    The high sensitivity of the AT8031 assures useful output and an excellent match to most input sources. In some cases, however, an attenuator such as the Audio-Technica AT8202 may be required between the microphone and preamplifier to avoid overloading sensitive input stages.

    The microphone is RoHS compliant–free from all substances specified in the EU directive on hazardous substances.

    The AT8031 requires 11V to 52V DC phantom power or a 1.5V AA battery for operation. A battery need not be in place for phantom power operation.

    Output from the microphone’s XLRM-type connector is low impedance (Lo-Z) balanced. The signal appears across Pins 2 and 3; Pin 1 is ground (shield). Output phase is “Pin 2 hot” – positive acoustic pressure produces positive voltage at Pin 2.

    An integral 80 Hz high-pass filter provides easy switching from a flat frequency response to a low-end roll-off. The roll-off position reduces the pickup of low-frequency ambient noise (such as traffic, air-handling systems, etc.), room reverberation and mechanically coupled vibrations.

    • audio technica AT8031
  • AT8031 Specifications

    Fixed-charge back plate permanently polarized condenser
    Polar Pattern
    Frequency Response
    30 ~ 20,000 Hz
    Low Frequency Roll-Off
    80 Hz, 12 dB/octave
    Open Circuit Sensitivity
    PHANTOM: -44 dB (6.3 mV) re 1V at 1 Pa BATTERY: -45 dB (5.6 mV) re 1V at 1 Pa
    Phantom: 250 Ω
    Battery: 300 Ω
    Maximum Input Sound Level
    PHANTOM: 137 dB SPL, 1 kHz at 1% T.H.D. BATTERY: 123 dB SPL, 1 kHz at 1% T.H.D.
    Dynamic Range (Typical)
    PHANTOM: 113 dB, 1 kHz at Max SPL BATTERY: 99 dB, 1 kHz at Max SPL
    Signal-To-Noise Ratio
    70 dB, 1 kHz at 1 Pa
    Phantom Power Requirements
    11~52V DC, 2 mA typical
    Battery Type
    1.5V AA/UM3
    Battery Current / Life
    0.4 mA / 1200 hrs typical (alkaline)
    Flat, roll-off
    205 g
    193.0 mm long, 50.3 mm head diameter
    Output Connector
    Integral 3-pin XLRM-type
    Accessories Furnished
    AT8405a stand clamp for ⅝”-27 threaded stands;
    AT8114 windscreen;
    ⅝”-27 to ⅜”-16 threaded adapter;
    battery; soft protective pouch


    audio technica support 368_1_AT8031.pdf - Operation Manual