Audio Technica unipoint U853AU, unipoint U853AWU Specifications

• Designed f

or suspension over
choirs, instrumental groups
and theater stages

• UniLine

™

polar pattern

pro

vides narrow 90°

acceptance angle

• 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 (U853AU) and white (U853AWU)

• Operates on battery or phantom power

The U853AU 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 90° angle of acceptance provides well-balanced audio
pic

kup over a narrow area. 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 source 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 1.5 times the distance to the
closest performer. If additional mics are needed for wide sources,
they should be positioned apart laterally at least 1.5 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 positiv

e voltage at Pin 2.

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 pickup of low-frequency ambient noise
(such as tr

affic, 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.

8 kHz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

200 Hz

1 kHz
5 kHz

Frequency in Hertz

LEGEND

12" or more on axis
Roll-off

Frequency Response

Response in dB

Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224

Audio-Technica Limited, Old Lane, Leeds LS11 8AG England

www.audio-technica.com

P51695 ©2005 Audio-Technica U.S., Inc. Printed in U.S.A.

U853AU/U853AWU

Figure 1

Figure 2

LESS THAN 2 TIMES “X”

DIST

ANCE “X”

90

°

ANGLE OF
ACCEPT

ANCE

MIC A

1.5 TIMES

DIST

ANCE “X”

MIC B

90°90°

UNILINE™CONDENSER
HANGING MICROPHONES

U853AU/ U853AWU SPECIFICATIONS

†

ELEMENT Fix

ed-charge back plate

per

manently polarized

condenser

POLAR P

ATTERN

Line Cardioid

FREQUENCY RESPONSE 30-20,000 Hz
LO

W FREQUENCY ROLL-OFF

80 Hz, 18 dB/octa

ve

OPEN CIRCUIT SENSITIVITY –38 dB (12.5 mV) /
(Phantom / Batter

y) –39 dB (11.2 mV) re 1V at 1 Pa*

IMPED

ANCE

(Phantom / Batter

y) 200 ohms / 270 ohms

MAXIMUM INPUT SOUND LEVEL 130 dB / 120 dB SPL,
(Phantom / Batter

y) 1 kHz at 1% T.H.D.

D

YNAMIC RANGE

(typical)

110 dB / 100 dB,

(Phantom / Batter

y) 1 kHz at Max SPL

SIGNAL-T

O-NOISE RATIO

1

74 dB

, 1 kHz at 1 Pa*

PHANTOM POWER 11-52V DC, 2 mA typical
REQUIREMENTS

B

ATTERY TYPE

1.5V AA/UM3

B

ATTERY CURRENT / LIFE

0.4 mA / 1200 hours typical
(alkaline)

SWITCH Off

, on-flat, on roll-off

WEIGHT

MICR

OPHONE

1.1 oz (30 g)

PO

WER MODULE

4.9 oz (139 g)

DIMENSIONS

MICR

OPHONE

6.14" (156.0 mm) long,

0.48" (12.2 mm) diameter

POWER MODULE 3.31" (84.0 mm) H x

2.48" (63.0 mm)

W x

0.87" (22.0 mm) D

OUTPUT CONNECT

OR

Integ

ral 3-pin XLRM-type

(po

wer module)

CABLE 25,0' (7.6 m) long (per

manently
attached to microphone), 0.13"
(3.2 mm) diameter, 2-conductor,
shielded cab

le with TA3F-type

connector

OPTIONAL INTERCHANGEABLE UE-C cardioid (120

°);

ELEMENTS UE-H h

ypercardioid (100°);

UE-O omnidirectional (360

°)

ACCESSORIES FURNISHED

U853A

U

A

T8154 two-stage foam

windscreen;

AT8451 steel hanger

U853A

WU

A

T8154(WH) two-stage foam

windscreen;

AT8451(WH) steel

hanger

BOTH AT8531 power module; AT8438

5

/8"-27 stand adapter; battery

†

In the interest of standards development, A.T.U.S. offers full details on its test

methods to other industry professionals on request.

*1 P

ascal = 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.