Audio-Technica specifications AT875R Line + Gradient Condenser Microphone

AT875R LINE + GRADIENT CONDENSER MICROPHONE

•Designed for video production and broadcast (ENG/EFP) audio acquisition

•Extremely short length (under 7") ideal for use with compact digital cameras

•Provides the narrow acceptance angle desirable for long-distance sound pickup

•Excellent sound rejection from the sides and rear of mic

•Tailored response minimizes camera and handling noise

•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 be 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 RATIO1	74 dB, 1 kHz at 1 Pa*
PHANTOM POWER	11-52V DC, 2 mA typical
REQUIREMENTS
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 5/8"-27
	threaded stands; 5/8"-27 to 3/8"-16
	threaded adapter; windscreen;
	soft protective pouch

†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

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

P51977-01 ©2007 Audio-Technica U.S., Inc. Printed in Japan