Audio-Technica U857QLU, U857QU 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

U857QU/U857QLU

UNILINE™CONDENSER QUICK-MOUNT GOOSENECK MICROPHONES

• 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

• Self-contained electronics eliminate need for external power module

• Accepts interchangeable elements to permit angle of acceptance from 90° to 360°

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

• Quick-mount design with 3-pin XLRM-type connector insert at base plugs into any standard XLRF-type surface or cable connector

U857QU/U857QLU SPECIFICATIONS

†

ELEMENT Fixed-charge back plate

manently polarized condenser

per

POLAR P FREQ LO

ATTERN

UENCY RESPONSE

W FREQUENCY ROLL-OFF

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

OPEN CIRCUIT SENSITIVITY –35 dB (17.7 mV) re 1V at 1 Pa*

ANCE

IMPED MAXIMUM INPUT SOUND LEVEL 135 dB SPL, 1 kHz at 1%

YNAMIC RANGE

D SIGNAL-TO-NOISE RATIO

OM POWER REQUIREMENTS

PHANT

(typical)

250 ohms

115 dB, 1 kHz at Max SPL 74 dB, 1 kHz at 1 Pa* 11-52V DC

, 2 mA typical

T.H.D.

SWITCH Flat, roll-off WEIGHT

U857Q

5.7 oz (161 g)

U857QLU 5.9 oz (167 g)

DIMENSIONS

U857Q

19.17" (487.0 mm) long

U857QLU 23.74" (603.0 mm) long

0.48" (12.2 mm) head diameter

0.74 (18.9 mm) base diameter

OUTPUT CONNECT

ral 3-pin XLRM-type

Integ

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

CCESSORIES FURNISHED

†

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

*1 Pascal = 10 dynes /cm

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

Specifications are subject to change without notice

y professionals on request.

= 10 microbars = 94 dB SPL

ypercardioid (100°);

UE-O omnidirectional (360

T8154 two-stage foam

A windscreen;

AT8662 shock mount

°)

Included shock mount attenuates noise, shock and vibration

• transmitted through the mounting surface

The U857QU stands 19.17" (487.0 mm) from the table or podium; it is also available in a 23.74" (603.0 mm) version as U857QLU. The two models are identical in all other respects.

The U857QU requires 11V to 52V phantom power for operation.

Output from the microphone’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.

void leaving the microphone in the open sun or in areas where

A temperatures exceed 110° F (43° C) for extended periods. Extremely high humidity should also be avoided.

Shock Mount Installation

AT8662 mounting dimensions

A.1/16" (1.5 mm) pilot

holes 3 places on

2.29" (58.2 mm) circle.

B. 2.0" (51.0 mm)

through-hole for mount clearance

C. Outside edge of

flange, 2.79" (71.0 mm) diameter

Drawing not actual size.

1. Find the center of the mounting location and mark it. Allow enough clearance to accommodate the shock mount's flange on the surface and make certain there are no physical obstructions below the desired location.

2. Using 2.0" (51.0 mm) hole saw, drill the large through-hole for the shock mount.

3. Set the shock mount into the hole and mark the location of the three mounting screw holes.

Make certain to “center” the mount in the large hole before marking the three small mounting screw locations.

4. Using a 1/16" (1.5 mm) drill bit, drill three pilot holes for the mounting screws. After installing the microphone, assure maximum shock

5. mounting effectiveness by providing some slack in the connecting cable.

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

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

www.audio-technica.com

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