Audio-Technica U853RU Datasheet

U853RU & U853RWU

UniLine® Condenser Hanging Microphones

unipoint® microphones

Installation and Operation

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).

Features

• UniLine® polar pattern provides narrow 90º acceptance angle

• Low-prole design with low-reectance nish for minimum visibility

• Superior off-axis rejection for maximum gain before feedback

• UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)

• UniSteep® lter provides a steep low-frequency attenuation to minimize pickup of undesired ambient noise

• Available interchangeable elements permit angle of acceptance from 90º to 360º

• Steel hanger positions microphone over choirs, instrumental groups and theater stages

• Available in two colors: black (U853RU) and white (U853RWU)

Description

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.

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® lter provides easy switching from a at frequency response to a low-end roll-off. The roll-off position reduces the pickup of low-frequency ambient noise (such as trafc, airhandling systems, etc.), room reverberation and mechanically coupled vibrations. To engage the UniSteep® lter, 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.

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 at response or low-frequency roll-off (via integral 80 Hz high-pass UniSteep® lter) 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-reectance black nish. It is also available with white housing, cable, hanger and windscreen as the U853RWU.

AN 2 TIMES

“X

90° ANGLE OF ACCEPTANCE

“

”

Figure 1 Figure 2

MIC B

MIC A

1.5 TIMES

DISTANCE “X”

349

U853RU & U853RWU

Architect’s and Engineer’s Specications

The microphone shall be a xed-charge condenser designed for permanent installation or portable applications. It shall have a UniLine® (line cardioid) polar pattern with a uniform 90° angle of acceptance and a frequency response of 30 Hz to 20,000 Hz. It shall be capable of accepting optional interchangeable elements for additional polar patterns. The microphone shall operate from an external 11V to 52V DC phantom power source. It shall be capable of handling sound input levels up to 135 dB with a dynamic range of 115 dB. Nominal open-circuit output voltage shall be 17.7 mV at 1 V, 1 Pascal. Output shall be low impedance balanced (250 ohms). It shall offer outstanding rejection of radio frequency interference (RFI).

The microphone shall have a permanently attached 7.6 m (25') miniature cable terminating in a special TA3F-type output connector designed to optimize RFI immunity. The output connector shall connect to a TB3M-type jack on the included power module. The power module shall contain a recessed switch to permit choice of at response or 80 Hz low-frequency roll-off. The output of the power module shall be a 3-pin XLRM-type connector.

An adjustable steel wire hanger shall be provided for suspended installations. The steel wire hanger shall attach to the microphone body and allow for the positioning of the microphone without the need for tools. A two-stage foam windscreen and a 5/8"-27 stand adapter shall also be included.

The microphone shall be a hanging design, with an overall length of 156.0 mm (6.14") and a head diameter of 12.2 mm (0.48"). Weight shall be 30 grams (1.1 oz) without cable. The microphone, cable and steel hanger shall be black [white].

The Audio-Technica U853RU [U853RWU] is specied.

Specications

Polar pattern

Frequency response

Low frequency roll-off

Open circuit sensitivity

Impedance

Maximum input sound level

Dynamic range (typical)

Signal-to-noise ratio

Phantom power requirements

Dimensions

Output connector

Optional interchangeable elements

Audio-Technica case style

Accessories furnished

U853RWU

Element

Switch Weight

Cable

U853RU

Fixed-charge back plate, permanently polarized condenser UniLine® (line cardioid) 30-20,000 Hz 80 Hz, 18 dB/octave –35 dB (17.7 mV) re 1V at 1 Pa 250 ohms 135 dB SPL, 1 kHz at 1% T.H.D. 115 dB, 1 kHz at Max SPL

74 dB, 1 kHz at 1 Pa 11-52V DC, 2 mA typical Flat, roll-off Microphone: 30 g (1.1 oz) Power module: 81 g (2.9 oz) Microphone: 156.0 mm (6.14") long,

12.2 mm (0.48") diameter Power module: 92.9 mm (3.66") long,

18.9 mm (0.74") diameter Power module: Integral 3-pin XLRM-type

7.6 m (25.0') long (permanently attached to microphone), 3.2 mm (0.13") diameter, 2-conductor, shielded cable with TA3Ftype connector UE-O omnidirectional (360°) UE-C cardioid (120°) UE-H hypercardioid (100°) M32

AT8538 power module; AT8451 steel hanger; AT8154 two-stage foam windscreen; AT8438 5/8"-27 stand adapter AT8538 power module; AT8451(WH) steel hanger; AT8154(WH) two-stage foam windscreen; AT8438 5/8"-27 stand adapter

5.20"

132.0 mm

156.0 m

In the intere st of standards develo pment, A.T.U.S. offers full

6.14"

details on it s test methods to othe r industry

1 Pascal = 10 dynes/cm

Typical, A-weighted , using Audio Precisio n System One

Specications are subject to change without notice.

professionals on request.

= 10 microba rs = 94 dB SPL

frequency response: 30–20,000 Hz

100

330˚

500

200

Frequency in Hertz 12" or more on axis Roll-off

0˚

30˚

150˚

180˚

60˚

90˚

120˚

LEGEND

200 Hz

1 kHz 5 kHz 8 kHz

0.48"

12.2 mm

0.13"

3.2 mm

25'

7.6 m

LEGEND

polar pattern

300˚

270˚

240˚

210˚

SCALE IS 5 DECIBELS PER DIVISION

10 dB

10k

Response in dB

20k