U857R/U857RL CARDIOID CONDENSER ADAPTER-MOUNT GOOSENECK MICROPHONES

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

• 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

• 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

Direct mounts to any 5/8"-27 stand, or to included threaded mounting flange

The U857R stands 12.01" (305.0 mm) from the table or podium; it is also available in a 16.58" (421.0 mm) version as U857RL. The two models are identical in all other respects.

The U857R requires 11V to 52V phantom power for operation.

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.

The U857R features a 9.8' (3.0 m) permanently attached miniature cable. It connects to the provided AT8538 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.

U857R/U857RL SPECIFICATIONS

ELEMENT

Fixed-charge back plate

 

permanently polarized

 

condenser

 

 

POLAR PATTERN

Cardioid

 

 

FREQUENCY RESPONSE

30-20,000 Hz

 

 

LOW FREQUENCY ROLL-OFF

80 Hz, 18 dB/octave

 

 

OPEN CIRCUIT SENSITIVITY

–39 dB (11.2 mV) re 1V at 1 Pa*

 

 

IMPEDANCE

250 ohms

 

 

MAXIMUM INPUT SOUND LEVEL

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

 

 

DYNAMIC RANGE (typical)

115 dB, 1 kHz at Max SPL

 

 

SIGNAL-TO-NOISE RATIO1

70 dB, 1 kHz at 1 Pa*

PHANTOM POWER

11-52V DC, 2 mA typical

REQUIREMENTS

 

 

 

SWITCH

Flat, roll-off

 

 

WEIGHT

 

U857R

4.4 oz (124 g)

U857RL

4.6 oz (131 g)

POWER MODULE

2.9 oz (81 g)

 

 

DIMENSIONS

 

U857R

12.01" (305.0 mm) long

U857RL

16.58" (421.0 mm) long

BOTH

0.48" (12.2 mm) head diameter

POWER MODULE

3.66" (92.9 mm) long,

 

0.74" (18.9 mm) diameter

 

 

OUTPUT CONNECTOR

Integral 3-pin XLRM-type

(power module)

 

 

 

CABLE

9.8' (3.0 m) long (permanently

 

attached to microphone), 0.13"

 

(3.2 mm) diameter, 2-conductor,

 

shielded cable with TA3F-type

 

connector

 

 

OPTIONAL INTERCHANGEABLE

UE-H hypercardioid (100°);

ELEMENTS

UE-O omnidirectional (360°);

 

UE-UL UniLine(90°)

 

 

ACCESSORIES FURNISHED

AT8538 power module;

 

AT8663 A-mount flange;

 

AT8664 A-mount cable pass-

 

through adapter; AT8153 two-

 

stage foam windscreen

 

 

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

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

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

www.audio-technica.com

P51689 ©2005 Audio-Technica U.S., Inc. Printed in U.S.A.

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Audio-Technica specifications U857R/U857RL SPECIFICATIONS† Element, Polar Pattern, Frequency Response, Impedance, Both

U857R, U857RL specifications

Audio-Technica has long been recognized for its commitment to quality audio equipment, and the U857RL and U857R are no exceptions. These professional-grade microphones are designed to cater to the needs of sound engineers, performers, and broadcast professionals, ensuring every sound is captured with precision and clarity.

One of the standout features of the U857RL and U857R is their condenser microphone design. Condenser mics are known for their ability to capture a broad frequency range, making them ideal for vocals and a variety of instruments. The U857RL comes equipped with a hypercardioid polar pattern, which effectively isolates the desired sound source while minimizing background noise. This characteristic makes it particularly suitable for situations where ambient sound control is critical, such as in live performances or broadcasting.

In contrast, the U857R employs a cardioid polar pattern. This design serves a similar purpose but offers a slightly wider pickup angle, allowing for more versatility in capturing sound from different angles. Both microphones feature high-performance audio capture capabilities, with a frequency response ranging from 40 Hz to 20 kHz. This wide bandwidth ensures that even the most nuanced sounds are reproduced faithfully, whether it’s a singer’s delicate vocal delivery or the rich tones of a musical instrument.

Another noteworthy technology found in both models is the low self-noise level. With a self-noise of just 23 dB SPL, these microphones are silent enough to record the most subtle sounds without introducing unwanted noise. Additionally, the U857RL and U857R both feature a durable construction that is designed to withstand the rigors of professional use, ensuring longevity and reliability in various settings.

Both models come with an included gooseneck design, allowing for convenient positioning and flexibility in mounting scenarios. The U857RL even incorporates a built-in LED indicator, which provides visual feedback for easy monitoring during use. Moreover, these microphones are compatible with standard XLR connections, making them easy to integrate into existing audio systems.

In summary, the Audio-Technica U857RL and U857R are exceptional microphones that combine innovative technologies and high-quality components. Their robust performance, diverse polar patterns, and ergonomic design make them suitable for a wide range of applications, from studio recordings to live sound reinforcement. With Audio-Technica’s reputation for excellence, these microphones represent a smart investment for audio professionals seeking reliable and superior sound capture.