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U853A / U853AW
• Operates on battery or phantom power
The U853A requires 11V to 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.
A uniform 120° angle of acceptance provides well-balanced audio
pickup. The microphone should be located forward of the front-most
source, above the rear-most source, and "aimed" between them
(Fig.1). Increasing the height of the mic above the sources will tend
to equalize sound levels between them, but may also increase
background/reverberant sound pickup. When possible, the distance
from the mic to the rear-most pickup should be no more than twice
the distance to the front source, to maintain front-to-rear balance
(Fig. 1).
Width of pickup is approximately three times the distance to the
closest performer. If additional mics are needed for wide sources,
they should be positioned apart laterally at least three times the
distance to the front source, to avoid phase cancellation (Fig. 2).
To orient the microphone in the proper direction, twist the housing
slightly in its wire holder. (Clockwise rotation moves the microphone
to the right; counterclockwise rotation moves it to the left.)
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.
An integral 80 Hz high-pass UniSteep
from a flat frequency response to a low-end roll-off. The
roll-off position 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.
NOTE: Audio-Technica has developed a special RFI-shielding
mechanism, which is an integral part of the connectors in the
UniPoint line. If you remove or replace the connector, you may
adversely affect the unit's RFI immunity.
CARDIOID CONDENSER
HANGING MICROPHONES
• Designed for suspension over
choirs, instrumental groups
and theater stages
• Superior off-axis rejection for
maximum gain before
feedback
• UniGuard
™
RFI-shielding
technology offers outstanding
rejection of radio frequency
interference (RFI)
• UniSteep
®
filter provides a
steep low-frequency
attenuation to improve sound
pickup without affecting voice
quality
• Accepts interchangeable
elements to permit angle of
acceptance from 90° to 360°
• Low-profile design with
low-reflectance finish for
minimum visibility
• Available in two colors: black
(U853A) and white (U853AW)
®
filter provides easy switching
U853A / U853AW 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
MICROPHONE
POWER MODULE
DIMENSIONS
MICROPHONE
POWER MODULE
OUTPUT CONNECTOR
(power module)
CABLE
OPTIONAL INTERCHANGEABLE
ELEMENTS
ACCESSORIES FURNISHED
U853A
U853AW
BOTH
† 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
120°
ANGLE OF
ACCEPTANCE
Figure 1
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P51694
©2005 Audio-Technica U.S., Inc.
†
Fixed-charge back plate
permanently polarized
condenser
Cardioid
30-20,000 Hz
80 Hz, 18 dB/octave
–42 dB (7.9 mV) /
–43 dB (7.0 mV) re 1V at 1 Pa*
200 ohms / 270 ohms
133 dB / 123 dB SPL,
1 kHz at 1% T.H.D.
109 dB / 99 dB,
1 kHz at Max SPL
70 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
0.5 oz (14 g)
4.9 oz (139 g)
1.34" (34.0 mm) long,
0.48" (12.2 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
25.0' (7.6 m) long (permanently
attached to microphone), 0.13"
(3.2 mm) diameter, 2-conductor,
shielded cable with TA3F-type
connector
UE-H hypercardioid (100°);
UE-O omnidirectional (360°);
UE-UL UniLine
™
(90°)
AT8153 two-stage foam
windscreen; AT8451 steel hanger
AT8153(WH) two-stage foam
windscreen; AT8451(WH) steel
hanger
AT8531 power module; AT8438
5
/
"-27 stand adapter; battery
8
Frequency Response
Frequency in Hertz
12" or more on axis
Roll-off
120°
120°
MIC A
MIC B
3 TIMES
DISTANCE "X"
Figure 2
Printed in U.S.A.
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