U857Q & U857QL
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
0001-0128-01
Specifications
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
1
Typical, A-weighted, using Audio Precision System One.
Specifications are subject to change without notice.
Architect’s and Engineer’s Specifications
The microphone shall be a fixed-charge condenser designed for
permanent installation or portable applications. It shall have a cardioid
polar pattern with a uniform 120° angle of acceptance. and a frequency
response of 30 Hz to 20,000 Hz. It shall be capable of accepting
optional interchangeable elements for additional polar patterns. The
microphone shall operate from an external 11V to 52V DC phantom
power source. It shall be capable of handling sound input levels up to
139 dB with a dynamic range of 115 dB. Nominal open-circuit output
voltage shall be 11.2 mV at 1 V, 1 Pascal. Output shall be low impedance
balanced (250 ohms). It shall offer outstanding rejection of radio
frequency interference (RFI).
The microphone shall incorporate a self-contained power module with
an XLRM-type connector at the base for direct connection to a mating
XLRF-type panel jack or cable connector. It shall include a recessed switch
to permit choice of flat response or 80 Hz low-frequency roll-off.
A microphone shock mount shall be supplied for installing the microphone
in a solid surface; it shall effectively isolate the microphone from noise,
shock and vibration transmitted through the mounting surface. A two-
stage foam windscreen shall also be included.
The microphone shall be a small-diameter alternating gooseneck design,
with an overall length of 365.0 mm (14.37") [481.0 mm (18.94")] and a
head diameter of 12.2 mm (0.48"). Weight shall be 144 grams (5.1 oz)
[150 grams (5.3 oz)]. Finish shall be low-reflectance black.
The Audio-Technica U857Q [U857QL] is specified.
Fixed-charge back plate, permanently
polarized condenser
Cardioid
30-20,000 Hz
80 Hz, 18 dB/octave
–39 dB (11.2 mV) re 1V at 1 Pa
250 ohms
139 dB SPL, 1 kHz at 1% T.H.D.
115 dB, 1 kHz at Max SPL
70 dB, 1 kHz at 1 Pa
11-52V DC, 2 mA typical
Flat, roll-off
U857Q: 144 g (5.1 oz)
U857QL: 150 g (5.3 oz)
U857Q: 365.0 mm (14.37") long,
12.2 mm (0.48") head diameter,
18.9 mm (0.74") base diameter
U857QL: 481.0 mm (18.94") long,
12.2 mm (0.48") head diameter,
18.9 mm (0.74") base diameter
Integral 3-pin XLRM-type
UE-O omnidirectional (360°)
UE-H hypercardioid (100°)
UE-UL UniLine
®
(90°)
M34
AT8662 shock mount; AT8153 two-stage
foam windscreen
Element
Polar pattern
Frequency response
Low frequency roll-off
Open circuit sensitivity
Impedance
Maximum input sound level
Dynamic range (typical)
Signal-to-noise ratio
1
Phantom power requirements
Switch
Weight
Dimensions
Output connector
Optional interchangeable elements
Audio-Technica case style
Accessories furnished
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
SCALE IS 5 DECIBELS PER DIVISION
240˚
180˚
210˚
270˚
300˚
330˚
0˚
150˚
120˚
90˚
30˚
60˚
12" or more on axis
LEGEND
Frequency in Hertz
Response in dB
10 dB
100
50
200
10k
5k
1k
500
2k
20k
Roll-off
frequency response: 30–20,000 Hz
polar pattern
U857Q
U857QL
0.48"
10.0 mm
0.39"
355.0 mm
13.98"
12.2 mm
0.74"
18.9 mm
14.37"
365.0 mm
12.2 mm
0.39"
10.0 mm
0.48"
18.55"
471.0 mm
18.94"
481.0 mm
18.9 mm
0.74"
0.48"
10.0 mm
0.39"
355.0 mm
13.98"
12.2 mm
0.74"
18.9 mm
14.37"
365.0 mm
12.2 mm
0.39"
10.0 mm
0.48"
18.55"
471.0 mm
18.94"
481.0 mm
18.9 mm
0.74"
277
