U857AU

Overview

U857AU

Audio-Technica’s U857AU incorporates the most essential ingredients for quality sound reproduction for a wide range of installed applications. Equipped with A-T’s UniLine® line-cardioid element with a tightly focused 90º acceptance angle, the U857AU features a small-diameter gooseneck with virtually no “memory.” Its ultra-flexible, robust design permits easy adjustment into desired shape while resisting inadvertent repositioning. The 16.81"-long UniLine® condenser direct mounts to any 5/8"-27 stand. Featuring UniGuard® innovations that offer unsurpassed immunity from radio frequency interference, the U857AU accepts interchangeable elements, available in cardioid, hypercardioid, omnidirectional and UniLine® line cardioid polar patterns. The battery- or phantom-powered microphone also offers an 80 Hz low-cut UniSteep® filter that reduces pickup of low-frequency ambient noise.

Features

Designed for high-quality sound reinforcement, professional recording and broadcasting
UniLine™ polar pattern provides narrow 90º 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 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
Operates on battery or phantom power

Specifications

Microphones
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	Phantom: –38 dB (12.5 mV) re 1V at 1 Pa Battery: –39 dB (11.2 mV) re 1V at 1 Pa
Maximum Input Sound Level	Phantom: 130 dB SPL, 1 kHz at 1% T.H.D. Battery: 120 dB SPL, 1 kHz at 1% T.H.D.
Dynamic Range	Phantom: 110 dB, 1 kHz at Max SPL Battery: 100 dB, 1 kHz at Max SPL
Signal-to-Noise Ratio	74 dB, 1 kHz at 1 Pa
Phantom Power Requirements	11-52V DC, 2 mA typical
Battery Type	1.5V AA/UM3
Battery Current/Life	0.4 mA / 1200 hours typical (alkaline)
Switches	Off, on-flat, on-roll-off
Weight (Microphone)	5.0 oz (141 g)
Weight (Power Module)	4.9 oz (139 g)
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
Dimensions (Power Module)	3.31" (84.0 mm) H x 2.48" (63.0 mm) W x 0.87" (22.0 mm) D
Dimensions (Microphone)	16.81" (427.0 mm) long, 0.48" (12.2 mm) head diameter
Output Connector (Power Module)	Integral 3-pin XLRM-type
Optional Interchangeable Elements	UE-C cardioid (120°); UE-H hypercardioid (100°); UE-O omnidirectional (360°)
Accessories Included	AT8531 power module; AT8154 two-stage foam windscreen; AT8663 A-mount flange; AT8664 A-mount cable pass-through adapter; battery
Audio-Technica Case Style	M33

Downloads

U857AU Submittal Sheet

U857AU Specification Sheet