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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
SCALE IS 5 DECIBELS PER DIVISION
Polar Pattern
200 Hz
LEGEND
5 kHz
1 kHz
8 kHz
12" or more on axis
LEGEND
Roll-off
Frequency in Hertz
Frequency Response
Response in dB
• 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
batter
y 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
permanently polarized
condenser
POLAR PATTERN Omnidirectional
FREQUENCY RESPONSE 30-20,000 Hz
LOW FREQUENCY ROLL-OFF 80 Hz, 18 dB/octave
OPEN CIRCUIT SENSITIVITY –44 dB (6.3 mV) /
(Phantom / Battery) –46 dB (5.0 mV) re 1V at 1 Pa*
IMPEDANCE (Phantom / Battery) 200 ohms / 270 ohms
MAXIMUM INPUT SOUND LEVEL 135 dB / 121 dB SPL,
(Phantom / Battery) 1 kHz at 1% T.H.D.
DYNAMIC RANGE, (typical) 107 dB / 93 dB,
(Phantom / Battery) 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO
1
66 dB, 1 kHz at 1 Pa*
PHANTOM POWER 11-52V DC, 2 mA typical
REQUIREMENTS
BATTERY TYPE 1.5V AA/UM3
BATTERY CURRENT / LIFE 0.4 mA / 1200 hours typical
(alkaline)
SWITCH Off, on-flat, on-roll-off
WEIGHT (less cable and accessories)
MICROPHONE 2.8 g (0.1 oz)
POWER MODULE 139 g (4.9 oz)
DIMENSIONS
MICROPHONE 25.0 mm (0.98") long,
10.2 mm (0.40") diameter
POWER MODULE 84.0 mm (3.31") H x
63.0 mm (2.48") W x
22.0 mm (0.87") D
OUTPUT CONNECTOR Integral 3-pin XLRM-type
(power module)
CABLE 1.8 m (6') long (permanently
attached to microphone),
2.6 mm (0.10") diameter,
2-conductor, shielded cable with
TA3F-type connector
ACCESSORIES FURNISHED AT8531 power module;
AT8419 clothing clip;
AT8116 windscreen; battery;
protective carrying case
†
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
1
Typical, A-weighted, using Audio Precision System One.
Specifications are subject to change without notice.
AT803
MINIATURE OMNIDIRECTIONAL
CONDENSER MICROPHONE