U857QU/U857QLU UNILINECONDENSER QUICK-MOUNT GOOSENECK MICROPHONES

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

• UniLinepolar pattern provides narrow 90° acceptance angle

• Superior off-axis rejection for maximum gain before feedback

• UniGuardRFI-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

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.

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.

U857QU/U857QLU SPECIFICATIONS

ELEMENT

Fixed-charge back plate

 

permanently polarized condenser

 

 

POLAR PATTERN

Line Cardioid

 

 

FREQUENCY RESPONSE

30-20,000 Hz

 

 

LOW FREQUENCY ROLL-OFF

80 Hz, 18 dB/octave

 

 

OPEN CIRCUIT SENSITIVITY

–35 dB (17.7 mV) re 1V at 1 Pa*

 

 

IMPEDANCE

250 ohms

 

 

MAXIMUM INPUT SOUND LEVEL

135 dB SPL, 1 kHz at 1% T.H.D.

 

 

DYNAMIC RANGE (typical)

115 dB, 1 kHz at Max SPL

 

 

SIGNAL-TO-NOISE RATIO1

74 dB, 1 kHz at 1 Pa*

PHANTOM POWER REQUIREMENTS

11-52V DC, 2 mA typical

 

 

SWITCH

Flat, roll-off

 

 

WEIGHT

 

U857QU

5.7 oz (161 g)

U857QLU

5.9 oz (167 g)

 

 

DIMENSIONS

 

U857QU

19.17" (487.0 mm) long

U857QLU

23.74" (603.0 mm) long

BOTH

0.48" (12.2 mm) head diameter,

 

0.74 (18.9 mm) base diameter

 

 

OUTPUT CONNECTOR

Integral 3-pin XLRM-type

 

 

OPTIONAL INTERCHANGEABLE

UE-C cardioid (120°);

ELEMENTS

UE-H hypercardioid (100°);

 

UE-O omnidirectional (360°)

 

 

ACCESSORIES FURNISHED

AT8154 two-stage foam

 

windscreen; AT8662 shock mount

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

*1 Pascal = 10 dynes/cm 2 = 10 microbars = 94 dB SPL

1Typical, A-weighted, using Audio Precision System One. Specifications are subject to change without notice.

Polar Pattern

Frequency Response

Response in dB

Frequency in Hertz

LEGEND

 

12" or more on axis

SCALE IS 5 DECIBELS PER DIVISION

 

Roll-off

LEGEND

200Hz 1 kHz 5 kHz 8 kHz

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.

5.After installing the microphone, assure maximum shock 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

P51692 ©2005 Audio-Technica U.S., Inc. Printed in U.S.A.

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Audio-Technica U857QU, U857QLU specifications Shock Mount Installation AT8662 mounting dimensions, Drawing not actual size

U857QU, U857QLU specifications

The Audio-Technica U857QU and U857QLU are premium gooseneck microphones designed for professional applications in various environments such as lecture halls, conference rooms, and houses of worship. These microphones are celebrated for their exceptional audio quality, versatility, and robust build, making them ideal for fixed installation scenarios.

One of the standout features of the U857QU and U857QLU is their condenser microphone design. They utilize a low-profile, cardioid polar pattern, which effectively isolates the desired sound source while minimizing background noise. This focus on audio pickup makes them perfect for speech and vocal applications where clarity and intelligibility are paramount.

The U857QU model features a 25-foot cable for flexible placements and includes a switchable low-frequency roll-off filter to help reduce handling noise and unwanted low-frequency disturbances. This makes it particularly effective in environments with heavy foot traffic or background sounds, ensuring a clear and professional audio output.

Conversely, the U857QLU comes equipped with a longer, 50-foot cable, offering even greater flexibility for installations requiring longer runs. Additionally, it features a longer gooseneck, allowing for a wider range of positioning options, especially when installed overhead. Both models are designed with a sturdy metal construction that ensures durability for years of reliable service.

The built-in power requirement of 11 to 52V phantom power makes these microphones compatible with a broad range of audio equipment, from mixers to interfaces. This versatility ensures that users can easily integrate the U857QU and U857QLU into existing audio setups without compatibility issues.

Both models also have a detachable design that allows easy maintenance and replacement. This feature is especially beneficial for venues that require rapid microphone swaps during events. In addition, the U857QU and U857QLU come with interchanged capsules, facilitating tailored applications depending on the specific needs of the user.

In summary, the Audio-Technica U857QU and U857QLU are excellent choices for anyone seeking high-quality gooseneck microphones for professional use. Their robust construction, exceptional audio performance, and user-friendly design make them perfect for a multitude of applications, ensuring clear and impactful sound delivery in any setting.