Audio-Technica U857AU User's Manual
Contents
1. its test methods to other industry professionals on request 1 Pascal 10 dynes cm 10 microbars 94 dB SPL 1 Typical A weighted using Audio Precision System One Specifications are subject to change without notice Polar Pattern Frequency Response H 10 dB T 50 100 200 500 tk 2k Sk 108 20k Frequency in Hertz LEGEND 12 or more on axis Roof audio technica Audio Technica U S Inc 1221 Commerce Drive Stow Ohio 44224 Audio Technica Limited Old Lane Leeds LS11 8AG England www audio technica com P51688 2005 Audio Technica U S Inc Printed in U S A Response in dB2. U85 f AU UNILINE CONDENSER GOOSENECK MICROPHONE unipoint e Designed for high quality sound reinforcement professional recording and broadcasting e UniLine polar pattern provides narrow 90 acceptance angle e Superior off axis rejection for maximum gain before feedback e UniGuard RFl shielding technology offers outstanding rejection of radio frequency interference RFI e Easy to adjust rugged small diameter alternating gooseneck with virtually no memory permits quick positioning into desired shape e UniSteep filter provides a steep low frequency attenuation to improve sound pickup without affecting voice quality e 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 e Direct mounts to any e 27 stand or to included threaded mounting flange e 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 power 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 lo
3. oid FREQUENCY RESPONSE 30 20 000 Hz LOW FREQUENCY ROLL OFF OPEN CIRCUIT SENSITIVITY Phantom Battery IMPEDANCE Phantom Battery MAXIMUM INPUT SOUND LEVEL Phantom Battery DYNAMIC RANGE typical Phantom Battery 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 80 Hz 18 dB octave 38 dB 12 5 mV 39 dB 11 2 mV re 1V at 1 Pa 200 ohms 270 ohms 130 dB 120 dB SPL 1 kHz at 1 T H D 110 dB 100 dB BATTERY TYPE 1 5V AA UM3 BATTERY CURRENT LIFE 0 4 mA 1200 hours typical alkaline SWITCH Off on flat on roll off WEIGHT MICROPHONE 5 0 oz 141 g POWER MODULE 4 9 oz 139 g DIMENSIONS MICROPHONE 16 81 427 0 mm long 0 48 12 2 mm head diameter 3 31 84 0 mm H x 2 48 63 0 mm W x 0 87 22 0 mm D POWER MODULE 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 UE C cardioid 120 UE H hypercardioid 100 UE O omnidirectional 360 AT8531 power module AT8154 two stage foam windscreen AT8663 A mount flange AT8664 A mount cable pass through adapter battery OPTIONAL INTERCHANGEABLE ELEMENTS ACCESSORIES FURNISHED Tin the interest of standards development AT U S offers full details on
4. w 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 U857AU features a 9 8 3 0 m permanently attached miniature cable 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 RFl 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 U857AU SPECIFICATIONSt ELEMENT Fixed charge back plate permanently polarized condenser POLAR PATTERN Line Cardi
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