Audix M1255B-HC
Miniature Condenser Microphone, RFI Shielded, High-Sensitivity, Hypercardioid


The M1255B, a miniaturized condenser microphone with a fully integrated preamp and detachable cable, is designed with a very high sensitivity for distance miking. Applications include ceiling mount or table mount for conferencing, overhead choir miking, location recording, audience or room miking.

The M1255B has complete immunity from RF interference caused by cell phones and GSM devices. The M1255B-HC, which is equipped with a hypercardioid capsule, is also available with cardioid, omni or shotgun capsules, giving the microphone the unique ability to be used in a wide variety of live, studio and broadcast applications.

The M1255B is available in black or white (M1255B-W) with a wide array of clips and accessories allowing the microphone to be used for musical instruments, overhead stage miking, podiums, conferences and presentations.


  • Overhead mic for choir, group vocal
  • Acoustic instruments
  • Ambient room miking
  • Symphonic area miking
  • Speech / Presentation
  • Cymbals / Percussion


  • Small, lightweight, low profile
  • Miniaturized integrated preamp circuitry
  • No external power adapter needed
  • 12 mm gold vapor diaphragm
  • Immune to RF interference
  • Extremely low noise, high sensitivity
  • Available with a cardioid, hypercardioid, omni or supercardioid capsule


  • Transducer Type: Condenser
  • Frequency Response: 50Hz-19kHz
  • Polar Pattern: Hypercardioid (included)
    Optional: Cardioid, Omni, Supercardioid
  • Output Impedance: 150 ohms
  • Sensitivity: 32 mV/Pa @ 1k
  • Signal/Noise Ratio (A-weighted): 73 dB
  • Equivalent Noise Level: (A-weighted): 21 dB
  • Maximum SPL @ .5% thd: >/=130 dB
  • Dynamic Range: 109 dB
  • Power Requirements: 18-52 V
  • Connector: 3-pin mini-XLRM
  • Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3
  • Housing/Finish: Machined Brass/Powder coat
  • Weight: 0.7 oz
  • Length: 2.1"
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