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AT803
MINIATURE OMNIDIRECTIONAL
CONDENSER MICROPHONE
• 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
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.
®
filter provides easy
AT803 SPECIFICATIONS
†
ELEMENT
POLAR PATTERN
FREQUENCY RESPONSE
LOW FREQUENCY ROLL-OFF
OPEN CIRCUIT SENSITIVITY
(Phantom / Battery)
IMPEDANCE (Phantom / Battery)
MAXIMUM INPUT SOUND LEVEL
(Phantom / Battery)
DYNAMIC RANGE, (typical)
(Phantom / Battery)
SIGNAL-TO-NOISE RATIO
1
PHANTOM POWER
REQUIREMENTS
BATTERY TYPE
BATTERY CURRENT / LIFE
SWITCH
WEIGHT (less cable and accessories)
MICROPHONE
POWER MODULE
DIMENSIONS
MICROPHONE
POWER MODULE
OUTPUT CONNECTOR
(power module)
CABLE
ACCESSORIES FURNISHED
† 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.
Polar Pattern
LEGEND
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
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.
Fixed-charge back plate
permanently polarized
condenser
Omnidirectional
30-20,000 Hz
80 Hz, 18 dB/octave
–44 dB (6.3 mV) /
–46 dB (5.0 mV) re 1V at 1 Pa*
200 ohms / 270 ohms
135 dB / 121 dB SPL,
1 kHz at 1% T.H.D.
107 dB / 93 dB,
1 kHz at Max SPL
66 dB, 1 kHz at 1 Pa*
11-52V DC, 2 mA typical
1.5V AA/UM3
0.4 mA / 1200 hours typical
(alkaline)
Off, on-flat, on-roll-off
2.8 g (0.1 oz)
139 g (4.9 oz)
25.0 mm (0.98") long,
10.2 mm (0.40") diameter
84.0 mm (3.31") H x
63.0 mm (2.48") W x
22.0 mm (0.87") D
Integral 3-pin XLRM-type
1.8 m (6') long (permanently
attached to microphone),
2.6 mm (0.10") diameter,
2-conductor, shielded cable with
TA3F-type connector
AT8531 power module;
AT8419 clothing clip;
AT8116 windscreen; battery;
protective carrying case
Frequency Response
Frequency in Hertz
12" or more on axis
Roll-off
Printed in Japan
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