AT831b Cardioid Condenser Lavalier Microphone


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This clip-on lavalier mic provides crisp, full-sounding voice pickup and excels as an instrument mic, especially for pickup of acoustic guitar with included AT8444 guitar adapter. It offers excellent gain before feedback and suppression of background noise. An integral 80 Hz high-pass filter provides easy switching from a flat frequency response to a low-end roll-off. It operates on battery or phantom power.


• Clip-on lavalier mic also excels in acoustic guitar applications
• Provides crisp, full-sounding voice and instrument pickup
• Operates on battery or phantom power
• 6' (1.8 m) cable permanently attached to mic, TA3F connector at power module

Element: Fixed-charge back plate, permanently polarized condenser
Polar Pattern: Cardioid
Frequency Response: 40-16,000 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
Impedance: 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)
Switch: Off, on-flat, on-roll-off
Weight: (MICROPHONE) 0.1 oz (2.8 g)
Weight: (POWER MODULE) 4.9 oz (139 g)
Dimensions: (MICROPHONE) 0.98" (25.0 mm) long, 0.40" (10.2 mm) diameter
Dimensions: (POWER MODULE) 3.31" (84.0 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
Cable: 6' (1.8 m) long (permanently attached to microphone), 0.10" (2.6 mm) diameter, 2-conductor, shielded cable with TA3F-type connector
Accessories Furnished: Clothing clip; AT8444 instrument adapter; AT8531 power module; AT8116 windscreen; battery; protective carrying case
Audio-Technica Case Style: M1
More Information
Weight 1.080000
Length 4.4
Width 10.4
Height 2.1
Color Black
Manufacturer Audio-Technica
Manufacturer Model Number AT831B
Manufacturer Part Number AT831B
UPC 4961310098674
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