Audio-Technica U841A User's Manual
Contents
1. MAXIMUM INPUT SOUND LEVEL Phantom Battery 132 dB 122 dB SPL 1 kHz at 1 T H D DYNAMIC RANGE typical Phantom Battery 111 dB 101 dB 1 kHz at Max SPL SIGNAL TO NOISE RATIO 73 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 SWITCH Off on flat on roll off WEIGHT MICROPHONE 2 8 oz 78 g POWER MODULE 4 9 oz 139 g DIMENSIONS MICROPHONE 2 56 65 0 mm diameter POWER MODULE 0 59 15 1 mm height 3 31 84 0 mm H x 2 48 63 0 mm W x 0 87 22 0 mm D OUTPUT CONNECTOR Integral 3 pin XLRM type power module CABLE 25 7 6 m long permanently attached to microphone 0 13 3 2 mm diameter 2 conductor shielded cable with TA3F type connector ACCESSORIES FURNISHED AT8531 power module battery soft protective pouch Tin 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 10 microbars 94 dB SPL Typical A weighted using Audio Precision System One Specifications are subject to change without Polar Pattern notice Frequency Response 10 dB 50 100 LEGEND 200 12 or more Roll off 502. 0 1k 2k 5k 10k 20k Frequency in Hertz on axis 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 P51700 2005 Audio Technica U S Inc Printed in U S A Response in dB
3. OMNIDIRECTIONAL CONDENSER BOUNDARY MICROPHONE U841A unipoint e Designed for surface mount applications such as high quality sound reinforcement professional recording television conferencing and other demanding sound pickup situations e UniGuard RFl shielding technology offers outstanding rejection of radio frequency interference RFI e UniSteep filter provides a steep low frequency attenuation to improve sound pickup without affecting voice quality e Small diameter UniPoint capsule near boundary eliminates phase distortion and delivers clear high output performance e Heavy die cast case and silicon foam bottom pad minimize coupling of surface vibration to the microphone e Low profile design with low reflectance black finish for minimum visibility e Operates on battery or phantom power The U841A 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 The microphone should be placed on a flat unobstructed mounting surface The sound source should not be below the plane of the mounting surface Output from the power module s XLRM type connec
4. tor 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 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 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 NOTE Placing any object on a surface such as a conference table before its finish is fully cured may result in damage to the finish U841A SPECIFICATIONS ELEMENT Fixed charge back plate permanently polarized condenser POLAR PATTERN Omnidirectional in hemisphere above mounting surface FREQUENCY RESPONSE 30 20 000 Hz LOW FREQUENCY ROLL OFF 80 Hz 18 dB octave OPEN CIRCUIT SENSITIVITY Phantom Battery 39 dB 11 2 mV 40 dB 10 0 mV re 1V at 1 Pa IMPEDANCE Phantom Battery 200 ohms 270 ohms
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