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Audio-Technica AT831B Cardioid Condenser Lavalier Microphone


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List Price: $299.00

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Product Highlights

  • Miniature Capsule
  • Cardioid Polar Pattern
  • High Sensitivity
  • Cardioid
Audio-Technica AT831B: Picture 1 regular $199.00

About Audio-Technica AT831B

The Audio-Technica AT831B Cardioid Condenser Lavalier Microphone is a miniature cardioid lavalier microphone with a sensitivity and frequency response suitable for professional video, broadcast and sound reinforcement applications. The cardioid polar pattern is effective minimizing off-axis signal, providing high gain-before-feedback while using nearby monitors and speakers.

The wide frequency response of 40Hz to 20kHz enables audio signal to be reproduced with accurate detail and minimal noise at low frequencies. The miniature capsule enables the microphone to be hidden underneath clothing and the included windscreen protects against noise caused by plosive signals and wind.

Audio-Technica AT831B Features

  • Miniature Capsule: The miniature, unobtrusive capsule allows for easy concealment underneath clothing
  • Cardioid Polar Pattern: The cardioid polar pattern is effective in minimizing audio signal at the off-axis sections of the capsule. This provides high gain-before-feedback response while using nearby monitors and speakers
  • High Sensitivity: The frequency and sensitivity response of the AT831 result in transparent, pristine audio signal reproduction with low noise floor

Audio-Technica AT831B Specifications

Fixed-charge back plate, permanently polarized condenser
Polar pattern
Frequency response
40-18000 Hz
Low frequency roll-off
80 Hz, 18 dB/octave
Open circuit sensitivity
Phantom: -44 dB (6.3 mV) re 1V at 1 Pa
Battery: -46 dB (5.0 mV) re 1V at 1 Pa
Phantom: 200 ohms
Battery: 270 ohms
Maximum input sound level
Phantom: 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: 106 dB, 1 kHz at Max SPL
Battery: 92 dB, 1 kHz at Max SPL
Signal-to-noise ratio
65 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 hours typical (alkaline)
Off, on-flat, on-roll-off
Output connector
Power module: Integral 3-pin XLRM-type
Cable Length
1.8m / 6' (permanently attached to microphone), 2.6mm / 0.10" (Diameter), 2-conductor, shielded cable with TA3Ftype connector
Audio-Technica case style
Microphone: 25.0x10.2mm / 0.98x0.40" (LxDiameter)
Power Module: 84x63.0x22.0mm / 3.30x2.48x0.86" (LxWxD)
Microphone: 2.8g / 0.09oz
Power module: 139g / 4.9oz
Mfr #
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