Audio Technica unipoint U853A, unipoint U853AW Specifications

• 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)

• 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 b

utton), 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 r

ight; 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

®

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 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.

8 kHz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

200 Hz
1 kHz

5 kHz

F

requency 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

P51694 ©2005 Audi

o-Technica U.S., Inc. Printed in U.S.A.

U853A/U853AW

U853

A/ U853AW SPECIFICATIONS

†

ELEMENT Fixed-charge back plate

per

manently polarized

condenser

POLAR P

ATTERN

Cardioid

FREQ

UENCY RESPONSE

30-20,000 Hz

LO

W FREQUENCY ROLL-OFF

80 Hz, 18 dB/octa

ve

OPEN CIRCUIT SENSITIVITY –42 dB (7.9 mV) /
(Phantom / Batter

y) –43 dB (7.0 mV) re 1V at 1 Pa*

IMPED

ANCE

(Phantom / Batter

y) 200 ohms / 270 ohms

MAXIMUM INPUT SOUND LEVEL 133 dB / 123 dB SPL,
(Phantom / Batter

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

D

YNAMIC RANGE

(typical)

109 dB / 99 dB,

(Phantom / Batter

y) 1 kHz at Max SPL

SIGNAL-T

O-NOISE RATIO

1

70 dB

, 1 kHz at 1 Pa*

PHANT

OM POWER

11-52V DC

, 2 mA typical

REQ

UIREMENTS
BATTERY TYPE 1.5V AA/UM3
B

ATTERY CURRENT / LIFE

0.4 mA / 1200 hours typical
(alkaline)

SWITCH Off

, on-flat, on-roll-off

WEIGHT

MICROPHONE

0.5 oz (14 g)

POWER MODULE 4.9 oz (139 g)

DIMENSIONS

MICR

OPHONE

1.34" (34.0 mm) long,

0.48" (12.2 mm) diameter

PO

WER 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 cable with TA3F-type
connector

OPTIONAL INTERCHANGEABLE UE-H h

ypercardioid (100°);

ELEMENTS UE-O omnidirectional (360

°);

UE-UL UniLine™(90

°)

A

CCESSORIES FURNISHED

U853A

AT8153 two-stage foam
windscreen; AT8451 steel hanger

U853AW AT8153(WH) two-stage foam

windscreen;

AT8451(WH) steel

hanger

BO

TH

A

T8531 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 industr

y 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

.

LESS THAN 2 TIMES “X”

DIST

ANCE “X”

120°
ANGLE OF
ACCEPTANCE

Figure 1

MIC A MIC B

3 TIMES

DISTANCE “X”

120°120°

Figure 2

CARDIOID CONDENSER
HANGING MICROPHONES