AT803 |
MINIATURE OMNIDIRECTIONAL |
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CONDENSER MICROPHONE |
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•High intelligibility for lecturers and stage/TV performers
•Provides excellent yet unobtrusive sound pickup
•UniSteep® filter provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality
•Operates on battery or phantom power
The AT803 is designed to be worn as a lavalier or hidden in loose clothing. 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 AT803 requires 11-52V DC phantom power, or a 1.5V AA battery for operation. A battery need not be in place for phantom power operation.
Battery installation: Remove the cap from the top of the power module. Insert a fresh 1.5V AA battery (“+” end toward the cap release button), then reassemble the power module. Alkaline batteries are recommended for longest life. Remove the battery during long-term storage.
Output from the power module's XLRM-type connector is low impedance (Lo-Z) balanced. The signal appears across Pins 2 and 3; Pin 1 is ground (shield). Output phase is “Pin 2 hot” – positive acoustic pressure produces positive voltage at Pin 2.
To avoid phase cancellation and poor sound, all mic cables must be wired consistently: Pin 1-to-Pin 1, etc.
An integral 80 Hz high-pass UniSteep® filter provides easy switching from a flat frequency response to a low-end roll-off. The roll-off position reduces the microphone’s sensitivity to popping in close vocal use. It also reduces the pickup of low-frequency ambient noise (such as traffic, air-handling systems, etc.), room reverberation and mechanically coupled vibrations.
The microphone is RoHS compliant–free from all substances specified in the EU directive on hazardous substances.
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.
AT803 SPECIFICATIONS†
ELEMENT |
Fixed-charge back plate |
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permanently polarized |
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condenser |
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POLAR PATTERN |
Omnidirectional |
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FREQUENCY RESPONSE |
30-20,000 Hz |
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LOW FREQUENCY ROLL-OFF |
80 Hz, 18 dB/octave |
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OPEN CIRCUIT SENSITIVITY |
–44 dB (6.3 mV) / |
(Phantom / Battery) |
–46 dB (5.0 mV) re 1V at 1 Pa* |
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IMPEDANCE (Phantom / Battery) |
200 ohms / 270 ohms |
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MAXIMUM INPUT SOUND LEVEL |
135 dB / 121 dB SPL, |
(Phantom / Battery) |
1 kHz at 1% T.H.D. |
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DYNAMIC RANGE, (typical) |
107 dB / 93 dB, |
(Phantom / Battery) |
1 kHz at Max SPL |
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SIGNAL-TO-NOISE RATIO1 |
66 dB, 1 kHz at 1 Pa* |
PHANTOM POWER |
11-52V DC, 2 mA typical |
REQUIREMENTS |
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BATTERY TYPE |
1.5V AA/UM3 |
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BATTERY CURRENT / LIFE |
0.4 mA / 1200 hours typical |
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(alkaline) |
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SWITCH |
Off, on-flat, on-roll-off |
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WEIGHT (less cable and accessories) |
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MICROPHONE |
2.8 g (0.1 oz) |
POWER MODULE |
139 g (4.9 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 |
84.0 mm (3.31") H x |
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63.0 mm (2.48") W x |
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22.0 mm (0.87") D |
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OUTPUT CONNECTOR |
Integral 3-pin XLRM-type |
(power module) |
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CABLE |
1.8 m (6') long (permanently |
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attached to microphone), |
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2.6 mm (0.10") diameter, |
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2-conductor, shielded cable with |
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TA3F-type connector |
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ACCESSORIES FURNISHED |
AT8531 power module; |
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AT8419 clothing clip; |
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AT8116 windscreen; battery; |
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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/cm2 = 10 microbars = 94 dB SPL
1 Typical, A-weighted, using Audio Precision System One. Specifications are subject to change without notice.
Polar Pattern Frequency Response
Response in dB
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Frequency in Hertz |
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LEGEND |
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12" or more on axis |
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SCALE IS 5 DECIBELS PER DIVISION |
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Roll-off |
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LEGEND |
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200 Hz |
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1 kHz |
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5 kHz |
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8 kHz |
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Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224 Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P52047 ©2008 Audio-Technica U.S., Inc. Printed in Japan