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AT803b
MINIATURE OMNIDIRECTIONAL CONDENSER MICROPHONE
• High intelligibility for lecturers and stage/TV performers
• Provides excellent yet unobtrusive sound pickup
• Switchable low-frequency roll-off
• Operates on battery or phantom power
The AT803b is designed to be worn as a lavalier or hidden in loose
clothing or in the hair. 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 AT803b requires 11-52V DC phantom power,
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. Inser t 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 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.
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.
AT803b 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
PHANTOM POWER
REQUIREMENTS
BATTERY TYPE
BATTERY CURRENT / LIFE
SWITCH
WEIGHT (less cable and accessories)
MICROPHONE
POWER MODULE
DIMENSIONS
MICROPHONE
POWER MODULE
or a 1.5V AA
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
1
Typical, A-weighted, using Audio Precision System One.
Specifications are subject to change without notice.
Polar Pattern
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
P51665-01
©2006 Audio-Technica U.S., Inc.
†
Fixed-charge back plate
permanently polarized
condenser
Omnidirectional
30-20,000 Hz
80 Hz, 18 dB/octave
–45 dB (5.6 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.
106 dB / 92 dB,
1 kHz at Max SPL
1
65 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
0.09 oz (2.5 g)
4.9 oz (139 g)
0.81" (20.5 mm) long,
0.39" (10.0 mm) diameter
3.31" (84.0 mm) H x
2.48" (63.0 mm) W x
0.87" (22.0 mm) D
Integral 3-pin XLRM-type
6' (1.8 m) long (permanently
attached to microphone), 0.10"
(2.6 mm) diameter, 2-conductor,
shielded cable with TA3F-type
connector
AT8417 clothing clip;
AT8531 power module;
AT8116 windscreen; battery;
protective carrying case
2
= 10 microbars = 94 dB SPL
Frequency Response
Frequency in Hertz
LEGEND
12" or more on axis
Roll-off
www.audio-technica.com
Printed in Japan
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