Audio-Technica Specifications, U857R & U857RL, frequency response 30-20,000Hz, polar pattern

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U857R & U857RL

[131 grams (4.6 oz)]. Finish shall be low-reflectance black. The Audio-Technica U857R [U857RL] is specified.

U857R U857RL

Specifications
Element	Fixed-charge back plate, permanently
	polarized condenser
Polar pattern	Cardioid
Frequency response	30-20,000 Hz
Low frequency roll-off	80 Hz, 18 dB/octave
Open circuit sensitivity	–39 dB (11.2 mV) re 1V at 1 Pa
Impedance	250 ohms
Maximum input sound level	139 dB SPL, 1 kHz at 1% T.H.D.
Dynamic range (typical)	115 dB, 1 kHz at Max SPL

0.48" 12.2 mm

0.39" 10.0 mm

12.01" 305.0 mm

11.62" 295.0 mm

0.13"	0.13"
3.2 mm	3.2 mm
	9.8'
	3.0 m

0.48" 12.2 mm

9.8' 3.0 m

0.39" 10.0 mm

16.58" 421.0 mm

16.19" 411.0 mm

Signal-to-noise ratio1	70 dB, 1 kHz at 1 Pa
Phantom power requirements	11-52V DC, 2 mA typical
Switch	Flat, roll-off
Weight	U857R Microphone: 124 g (4.4 oz)
	U857RL Microphone: 131 g (4.6 oz)
	Power module: 81 g (2.9 oz)
Dimensions	U857R Microphone: 305.0 mm (12.01")
	long,12.2 mm (0.48") head diameter
	U857RL Microphone: 421.0 mm (16.58")
	long, 12.2 mm (0.48") head diameter
	Power module: 92.9 mm (3.66") long,
	18.9 mm (0.74") diameter
Output connector	Power module: Integral 3-pin XLRM-type
Cable	3.0 m (9.8') long (permanently attached
	to microphone), 3.2 mm (0.13") diameter,
	2-conductor, shielded cable with TA3F-
	type connector
Optional interchangeable elements	UE-O omnidirectional (360°)
	UE-H hypercardioid (100°)
	UE-UL UniLine® (90°)
Audio-Technica case style	M2
Accessories furnished	AT8538 power module; AT8663 A-mount
	flange; AT8664 A-mount cable pass-
	through adapter; AT8153 two-stage foam
	windscreen

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/cm2 = 10 microbars = 94 dB SPL

1Typical, A-weighted, using Audio Precision System One. Specifications are subject to change without notice.

frequency response: 30–20,000 Hz

	in dB
10 dB	Response

50	100	200	500	1k	2k	5k	10k	20k
			Frequency in Hertz
LEGEND		12" or more on axis
		Roll-off
polar pattern
	330˚	0˚	30˚
300˚				60˚
270˚				90˚
240˚				120˚
					LEGEND
210˚			150˚			200 Hz
		180˚				1 kHz
						5 kHz
SCALE IS 5 DECIBELS PER DIVISION
						8 kHz

Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
©2010 Audio-Technica U.S., Inc. audio-technica.com	0001-0130-01