AT851a (DISCONTINUED)

Cardioid Condenser Boundary Microphone (battery/phantom)

MSRP* US$297.00

*Manufacturer's Suggested Retail Price. Actual selling price may vary; please check with an authorized Audio-Technica dealer.



  • Overview
  • Features
  • Specifications
  • Downloads

  • Overview


    The AT851a has been discontinued. The U851a is a similar model, click here for more information.
  • Features


    • Designed for surface-mount applications requiring high-quality sound pickup

    • Extended frequency response and uniform cardioid (120°) polar pattern

    • Heavy die-cast case and rubber bottom pad minimize coupling of surface vibration to the microphone

    • Operates on battery or phantom power

    • Low-profile design for minimum visibility

    • Also available as:
      AT851Wa in white
      AT851cW -- in black, less power module; 29.5" (0.75 m) cable terminated with locking 4-pin connector for A-T UniPakŪ wireless systems

  • Specifications

    ELEMENTFixed-charge back plate, permanently polarized condenser
    POLAR PATTERNCardioid
    FREQUENCY RESPONSE30-20,000 Hz
    LOW FREQUENCY ROLL-OFF80 Hz, 18 dB/octave
    OPEN CIRCUIT SENSITIVITYPHANTOM: -44 dB (6.3 mV) re 1V at 1 Pa
    BATTERY: -45 dB (5.6 mV) re 1V at 1 Pa
    IMPEDANCEPHANTOM: 200 ohms
    BATTERY: 270 ohms
    MAXIMUM INPUT SOUND LEVELPHANTOM: 135 dB SPL, 1 kHz at 1% T.H.D.
    BATTERY: 121 dB SPL, 1 kHz at 1% T.H.D.
    DYNAMIC RANGE (typical)PHANTOM: 108 dB, 1 kHz at Max SPL
    BATTERY: 94 dB, 1 kHz at Max SPL
    SIGNAL-TO-NOISE RATIO67 dB, 1 kHz at 1 Pa
    PHANTOM POWER REQUIREMENTS9-52V DC, 2 mA typical
    BATTERY TYPE1.5V AA/UM3
    BATTERY CURRENT / LIFE0.4 mA / 1200 hours typical (alkaline)
    SWITCHOff, on-flat, on-roll-off
    WEIGHT (MICROPHONE)4.2 oz (120 g)
    WEIGHT (POWER MODULE)5.2 oz (147 g)
    DIMENSIONS (MICROPHONE)2.52" (64.0 mm) maximum width,
    3.60" (91.5 mm) maximum length,
    0.63" (16.0 mm) height
    DIMENSIONS (POWER MODULE)3.27" (83.0 mm) H x
    2.48" (63.0 mm) W x
    0.87" (22.0 mm) D
    OUTPUT CONNECTOR (POWER MODULE)Integral 3-pin XLRM-type
    CABLE25' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded, with TA3F connectors
    ACCESSORIES FURNISHEDAT8531 power module; battery; soft protective pouch
    Click on the chart to view the larger image
    POLAR PATTERN
    POLAR PATTERN
    FREQUENCY RESPONSE
    FREQUENCY RESPONSE



    Conditions
  • Downloads

    AT851a, AT851Wa Specification Sheet (pdf 105.29 KB)
    Optional Windscreens / Mounts