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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.

  • 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


SKU: A231
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
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