Audio-Technica U857AU User Manual

8 kHz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

200 Hz

1 kHz 5 kHz

requency in Hertz

LEGEND

12" or more on axis

Roll-off

Frequency Response

Response in dB

U857AU UNILINE

™

CONDENSER GOOSENECK MICROPHONE

• Designed for high-quality sound reinforcement, professional recording and broadcasting

• UniLine

™

polar pattern provides 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)

• Easy-to-adjust, rugged, small-diameter, alternating gooseneck with virtually no “memory” permits quick positioning into desired shape

• 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 90º to 360º

• Two-stage foam windscreen yields dramatically improved resistance to P-pops and other breath blasts

• Direct mounts to any

/8"-27 stand, or to included threaded

mounting flange

• Operates on battery or phantom power

The U857AU requires 11-52V DC phantom power or a 1.5V AA battery for operation. A battery need not be in place for phantom

wer 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.

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 microphone’s sensitivity to popping in close vocal use. It also reduces the pickup of low-frequency ambient noise (such as traffic, air-handling systems, etc.), room reverberation and mechanically coupled vibrations.

U SPECIFICATIONS†

U857A ELEMENT

POLAR P FREQ LO

ATTERN

UENCY RESPONSE

W FREQUENCY ROLL-OFF

Fixed-charge back plate

manently polarized condenser

per Line Cardioid 30-20,000 Hz 80 Hz, 18 dB/octa

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

ANCE

IMPED

y) –39 dB (11.2 mV) re 1V at 1 Pa*

(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.

DYNAMIC RANGE (typical) 110 dB / 100 dB, (Phantom / Batter

SIGNAL-T

OM POWER REQUIREMENTS

PHANT

ATTERY TYPE

y) 1 kHz at Max SPL

O-NOISE RATIO

74 dB 11-52V DC

1.5V AA/UM3

, 1 kHz at 1 Pa*

, 2 mA typical

BATTERY CURRENT/LIFE 0.4 mA / 1200 hours typical

(alkaline)

SWITCH Off

, on-flat, on-roll-off

WEIGHT

OPHONE

MICR

WER MODULE

5.0 oz (141 g)

4.9 oz (139 g)

DIMENSIONS

OPHONE

MICR

16.81" (427.0 mm) long,

0.48" (12.2 mm) head diameter

WER MODULE

3.31" (84.0 mm) H x

2.48" (63.0 mm)

W x

0.87" (22.0 mm) D

OUTPUT CONNECTOR Integral 3-pin XLRM-type (power module)

CABLE 9.8' (3.0 m) long (per

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

, 2-conductor

le with TA3F-type

connector

OPTIONAL INTERCHANGEABLE UE-C cardioid (120°); ELEMENTS UE-H h

ypercardioid (100°);

UE-O omnidirectional (360

CCESSORIES FURNISHED

T8531 power module; AT8154

o-stage foam windscreen;

T8663 A-mount flange;

A AT8664 A-mount cable pass-through 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.

ascal = 10 dynes/cm

*1 P

Typical, A-weighted, using Audio Precision System One.

Specifications are subject to change without notice.

10 microbars = 94 dB SPL

°)

The U857AU features a 9.8' (3.0 m) permanently attached miniature cab

le. It connects to the provided AT8531 power module via a special TA3F-type connector designed to optimize RFI immunity.

Cable exit is from the bottom of the microphone. The included pass-through adapter, designed for use with desk stands and microphone stands, provides a side-exit for the cable.

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 U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224

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

www.audio-technica.com