Audio Technica unipoint U857R, unipoint U857RL Specifications
Frequency Response
Frequency in Hertz
LEGEND
12" or more on axis
Roll-off
Response in dB
U857R/U857RL
Polar Pattern
SCALE IS 5 DECIBELS PER DIVISION
8 kHz
LEGEND
200 Hz
1 kHz
5 kHz
CARDIOID CONDENSER ADAPTER-MOUNT
GOOSENECK MICROPHONES
• Designed for high-quality
sound reinforcement,
professional recording and
broadcasting
• Super
ior off-axis rejection for
maximum gain before
feedback
• UniGuard
™
RFI-shielding
technology offers outstanding
rejection of radio frequency
interference (RFI)
• Easy-to-adjust, rugged,
small-diameter, alternating
gooseneck with virtually no
“memory” permits quick
positioning into desired shape
• UniSteep
®
filter provides a
steep low-frequency
attenuation to improve sound
pickup without affecting voice
quality
• Accepts interchangeab
le
elements to permit angle of
acceptance from 90° to 360°
• Two-stage foam windscreen yields dramatically improved
resistance to P-pops and other breath b
• Direct mounts to any
5
/8"-27 stand, or to included threaded
lasts
mounting flange
The U857R stands 12.01" (305.0 mm) from the table or podium; it
is also available in a 16.58" (421.0 mm) version as U857RL. The
two models are identical in all other respects.
The U857R requires 11V to 52V phantom power for operation.
Output from the power module’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.
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 microphone’s sensitivity to popping in
close vocal use. It also reduces the pickup of low-frequency
ambient noise (such as traffic, air-handling systems, etc.), room
reverberation and mechanically coupled vibrations.
R/U857RL SPECIFICATIONS
U857
ELEMENT Fix
†
ed-charge back plate
manently polarized
per
condenser
POLAR P
FREQ
LO
ATTERN
UENCY RESPONSE
W FREQUENCY ROLL-OFF
Cardioid
30-20,000 Hz
80 Hz, 18 dB/octa
ve
OPEN CIRCUIT SENSITIVITY –39 dB (11.2 mV) re 1V at 1 P
IMPEDANCE 250 ohms
MAXIMUM INPUT SOUND LEVEL 139 dB SPL, 1 kHz at 1%
YNAMIC RANGE
D
SIGNAL-T
O-NOISE RATIO
(typical)
1
115 dB, 1 kHz at Max SPL
, 1 kHz at 1 Pa*
70 dB
T.H.D.
PHANTOM POWER 11-52V DC, 2 mA typical
REQUIREMENTS
SWITCH Flat, roll-off
WEIGHT
U857R
4.4 oz (124 g)
U857RL 4.6 oz (131 g)
POWER MODULE 2.9 oz (81 g)
DIMENSIONS
U857R
12.01" (305.0 mm) long
U857RL 16.58" (421.0 mm) long
TH
BO
WER MODULE
PO
0.48" (12.2 mm) head diameter
3.66" (92.9 mm) long,
0.74" (18.9 mm) diameter
OUTPUT CONNECTOR Integral 3-pin XLRM-type
(power module)
CABLE 9.8' (3.0 m) long (per
manently
attached to microphone), 0.13"
(3.2 mm) diameter
, 2-conductor,
shielded cable with TA3F-type
connector
OPTIONAL INTERCHANGEABLE UE-H hypercardioid (100°);
ELEMENTS UE-O omnidirectional (360
UE-UL UniLine™(90
CCESSORIES FURNISHED
A
T8538 power module;
A
T8663 A-mount flange;
A
°);
°)
AT8664 A-mount cable passthrough adapter; AT8153 twostage foam windscreen
†
In the interest of standards development, A.T.U.S. offers full details on its test
methods to other industr
*1 Pascal = 10 dynes/cm
1
Typical, A-weighted, using Audio Precision System One.
Specifications are subject to change without notice
y professionals on request.
2
= 10 microbars = 94 dB SPL
.
a*
The U857R features a 9.8' (3.0 m) permanently attached miniature
cable. It connects to the provided AT8538 power module via a
special
TA3F-type connector designed to optimize RFI immunity.
Cable exit is from the bottom of the microphone.The included passthrough adapter, designed for use with desk stands and
microphone stands, provides a side-exit for the cable.
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 RFI-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.
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P51689 ©2005 Audio-Technica U.S., Inc. Printed in U.S.A.
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