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Large diaphragm condenser vocal microphone

The A231 is a large diaphragm condenser microphone built for the most discerning studio user. With its externally-biased "true condenser" capsule and low-noise circuitry, the A231 is able to capture the nuances of the human voice as well as the rich overtones of acoustic instruments with natural warmth and in stunning detail. An exceptionally consistent cardioid polar pattern focuses on the performance while offering smooth off-axis rejection.

The 33 mm condenser capsule of the A231 features a precision-tensioned diaphragm made from a specially formulated, heat-treated film with gold deposition distributed evenly to the far edges of the diaphragm. The result is a 25% greater effective diaphragm area when compared to the capsule of a typical large diaphragm microphone.

Behind the double-woven steel mesh grille of the A231, acoustic reflections and diffractions are minimized for transparent sound capture. The internal shock mount isolates the capsule from mechanical vibrations, eliminating the need for a bulky external shock mount. Proprietary impedance control between the capsule and circuitry ensures consistent and reliable performance across a wide range of environments.

Designed, machined, assembled, and tested by Audix in Wilsonville, Oregon.
  • 33 mm externally-biased condenser capsule
  • 25% greater effective diaphragm area
  • Cardioid polar pattern
  • Proprietary internal shock mount
  • Low noise preamp circuitry
  • Machined aluminum body with gold-plated brass band
  • Transducer / Capsule Technology: 33 mm externally-biased condenser capsule / 29 mm 3.4 micron gold-sputtered diaphragm
    Frequency Response: 20 Hz " 20 kHz
    Polar Pattern: Cardioid
    Output Impedance: 150 ohms
    Sensitivity: 16 mV / Pa @ 1 kHz
    Signal to Noise Ratio: 82 dB
    Maximum SPL: 140 dB
    Dynamic Range: 128 dB
    Equivalent Noise Level: 12 dBA
    Operating Voltage: 48 V (± 4 V) Phantom
    Connector: 3-pin XLR m
    Materials / Finish: Body: Machined aluminum and gold-plated brass band Grille: Steel alloy
    Weight: 330 g / 11.6 oz

    1x A231 Microphone
    1x Protective zippered carrying case
    1x DCLIP Heavy-duty nylon molded snap-on clip

    Optional Accessories:
    APS2 " Two-channel 48 V phantom power supply with 110 V switchable to 240 V and detachable power cord
    TRIPOD " Metal tripod desktop mic stand
    STANDKD " Short pedestal stand with telescoping boom arm
    DFLEX " Dual pivot rim mounted clip with extra-wide butterfly jaws
    CBL20 " 20' premium XLR-XLR balanced mic cable. Quad conductor, twisted-pair with a braided shield for conductivity. 6 mm PVC-jacketed
    CBLDR25 " 25? premium right angle XLR balanced mic cable. Quad conductor, twisted pair with braided shield for conductivity. 6 mm PVC jacketed
    PD133 " Pop diffuser to control plosives
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