Audio-Technica AT875R User's Manual
Contents
1. AT8 r4 5R LINE GRADIENT CONDENSER MICROPHONE BROADCAST amp PRODUCTION MICROPHONES e Designed for video production and broadcast ENG EFP audio acquisition e Extremely short length under 7 ideal for use with compact digital cameras e Provides the narrow acceptance angle desirable for long distance sound pickup e Excellent sound rejection from the sides and rear of mic e Tailored response minimizes camera and handling noise e Operates on phantom power only The AT875R requires 11V to 52V DC 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 To avoid phase cancellation and poor sound all mic cables must be wired consistently Pin 1 to Pin 1 etc The high sensitivity of the AT875R assures useful output and an excellent match to most input sources In some cases however an attenuator such as the Audio Technica AT8202 may be required between the microphone and preamplifier to avoid overloading sensitive input stages The microphone is ROHS compliant free from all substances specified in the EU directive on hazardous substances 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 be2. avoided AT875R SPECIFICATIONS ELEMENT Fixed charge back plate permanently polarized condenser POLAR PATTERN Line gradient FREQUENCY RESPONSE 90 20 000 Hz OPEN CIRCUIT SENSITIVITY 30 dB 31 6 mV re 1V at 1 Pa IMPEDANCE 100 ohms MAXIMUM INPUT SOUND LEVEL 127 dB SPL 1 kHz at 1 T H D DYNAMIC RANGE typical 107 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 WEIGHT less accessories 80 g 2 8 oz DIMENSIONS 175 0 mm 6 89 long 21 0 mm 0 83 diameter OUTPUT CONNECTOR Integral 3 pin XLRM type ACCESSORIES FURNISHED AT8405a stand clamp for s 27 threaded stands s 27 to s 16 threaded adapter windscreen 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 1 Typical A weighted using Audio Precision System One Specifications are subject to change without notice Polar Pattern Frequency Response 10 dB 50 100 LEGEND SCALE IS 5 DECIBELS PER DIVISION LEGEND 500 1k 2k 5k 10k 20k Frequency in Hertz 12 or more on axis audio technica Audio Technica U S Inc 1221 Commerce Drive Sto
3. w Ohio 44224 Audio Technica Limited Old Lane Leeds LS11 8AG England www audio technica com Printed in Japan P51977 01 2007 Audio Technica U S Inc Z CE Response in dB
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