AT831R MINIATURE CARDIOID CONDENSER MICROPHONE
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•Also excels as an instrument mic, especially for pickup of acoustic guitar with included AT8444 instrument adapter
•Excellent gain before feedback and suppression of background noise
•UniSteep® filter provides a steep
•Operates on phantom power only
For use as a lavalier, attach the microphone about six inches below the chin. Anticipate movements that may cause the microphone to rub against or be covered by clothing, and position the microphone to avoid it.
The AT831R is intended for use in professional applications where remote power is available. It requires 11 to 52V DC phantom power, which may be provided by a mixer or console, or by a separate,
Output from the power module’s
To avoid phase cancellation and poor sound, all mic cables must be wired consistently: Pin
An integral 80 Hz
The microphone is RoHS
Avoid leaving the microphone in the open sun or in areas where temperatures exceed 110° F (43° C) for extended periods. Extremely high humidity should also be avoided.
AT831R SPECIFICATIONS†
ELEMENT | |
| permanently polarized |
| condenser |
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POLAR PATTERN | Cardioid |
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FREQUENCY RESPONSE | |
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LOW FREQUENCY | 80 Hz, 18 dB/octave |
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OPEN CIRCUIT SENSITIVITY | |
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IMPEDANCE | 250 ohms |
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MAXIMUM INPUT SOUND LEVEL | 141 dB SPL, 1 kHz at 1% T.H.D. |
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DYNAMIC RANGE (typical) | 112 dB, 1 kHz at Max SPL |
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65 dB, 1 kHz at 1 Pa* | |
PHANTOM POWER | |
REQUIREMENTS |
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SWITCH | Flat, |
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WEIGHT (less cable and accessories) |
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MICROPHONE | 2.8 g (0.1 oz) |
POWER MODULE | 81 g (2.9 oz) |
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DIMENSIONS |
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MICROPHONE | 25.0 mm (0.98") long, |
POWER MODULE | 10.2 mm (0.40") diameter |
92.9 mm (3.66") long, | |
| 18.9 mm (0.74") diameter |
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OUTPUT CONNECTOR | Integral |
(power module) |
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CABLE | 4.0 m (13.1') long (permanently |
| attached to microphone), |
| 3.2 mm (0.13") diameter, |
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ACCESSORIES FURNISHED | AT8538 power module; |
| AT8419 clothing clip; |
| AT8444 instrument adapter; |
| AT8116 windscreen; |
| protective carrying case |
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†In the interest of standards development, A.T.U.S. offers full details on its test methods to other industry professionals on request.
*1 Pascal = 10 dynes/cm 2 = 10 microbars = 94 dB SPL
1Typical,
Polar Pattern | Frequency Response |
Response in dB
Frequency in Hertz
SCALE IS 5 DECIBELS PER DIVISION | LEGEND |
| 12" or more on axis |
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LEGEND |
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200Hz 1 kHz 5 kHz 8 kHz
P52049 ©2008