Audio-Technica U853RWU Dépliant

 microphones

UniLine

®

 Condenser Hanging Microphones

The U853RU is a wide-range miniature condenser microphone with a 
UniLine

®

 (line cardioid) polar pattern. It is designed for quality sound 

reinforcement, professional recording, television and other demanding 
sound pickup applications. The combination of small size and excellent 
response makes the microphone ideal for suspension over choirs, 
instrumental groups or theater stages.

The microphone requires 11V to 52V phantom power for operation.

The microphone is equipped with UniGuard

®

 RFI-shielding technology, 

which offers outstanding rejection of radio frequency interference (RFI).

The microphone's UniLine

® 

(line cardioid) polar pattern provides a 

90° angle of acceptance. Additional interchangeable elements with 
omnidirectional (360°), cardioid (120°) and hypercardioid (100°) pickup 
patterns are available. 

The microphone Includes a 7.6 m (25') permanently attached miniature 
cable. Its free end connects to the provided AT8538 power module via 
a special TA3F-type connector designed to optimize RFI immunity. The 
output of the power module is a 3-pin XLRM-type connector.  

A recessed switch in the power module permits choice of flat response 
or low-frequency roll-off (via integral 80 Hz high-pass UniSteep

®

 filter) to 

help control undesired ambient noise.

The microphone comes equipped with a power module, a vinyl-coated 
steel hanger for positioning over a choir/orchestra/stage, a two-stage 
foam windscreen and a 

5

/

8

"-27 stand adapter. The microphone is enclosed 

in a rugged housing with a low-reflectance black finish. It is also available 
with white housing, cable, hanger and windscreen as the U853RWU.  

The U853RU requires 11V to 52V phantom power for operation.

A uniform 90° 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 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 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.

The provided two-stage foam windscreen simply slips over the head of 
the microphone, effectively reducing noise from wind or ventilation air 
currents.

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. To engage the UniSteep

®

 filter, use the end tip of a paperclip 

or other small pointed instrument to slide the switch toward the “bent” 
line.

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. Audio-Technica offers a crimp tool (ATCT) and RFI shields 
that enable you to shorten the cable and correctly reinstall the connector 
while maintaining the highest level of RFI immunity.

MIC A

1.5 TIMES

DISTANCE “X”

MIC B

90

°

90

°

Figure 1   

 

              Figure 2

LESS THAN 2 TIMES “X”

DIS

TA

NC

E “X

”

90

°

ANGLE OF

ACCEPTANCE