U
891
RC
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
Switches
Weight
Dimensions
Output connector
Cable
Optional interchangeable elements
Accessory furnished
Fixed-charge back plate, permanently
polarized condenser
Half-cardioid (cardioid in hemisphere
above mounting surface)
30-20,000 Hz
80 Hz, 18 dB/octave
–34 dB (19.9 mV) re 1V at 1 Pa
200 ohms
130 dB SPL, 1 kHz at 1% T.H.D.
104 dB, 1 kHz at Max SPL
68 dB, 1 kHz at 1 Pa
11-52V DC, 4 mA typical
Touch-sensitive control: on/off; Switch
function: touch on/off, momentary on,
momentary off; Control: local, remote,
LED remote; Flat, roll-off
266 g (9.4 oz)
108.0 mm (4.25") maximum length,
84.0 mm (3.31") maximum width,
23.0 mm (0.91") maximum height
TB5M-type
7.6 m (25.0') long, 3.2 mm (0.13")
diameter, 5-conductor shielded cable
(2 conductors under shield; 3 control
wires outside shield); TA5F-type
connector at microphone end, output end
stripped and tinned for connection to
electronic device
UE-O omnidirectional (360°)
UE-H hypercardioid (100°)
Soft protective pouch
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
Specifications
CONTROL Switch in “Local” Position
SW Setting
Microphone Audio
LED
External Contact Closure
TOUCH ON/OFF
Follows touch-
Follows touch-
Follows touch-
sensitive switch
sensitive switch
sensitive switch
MOM. ON
“On” when switch
“On” when switch
Closed when switch
is pressed
is pressed
is pressed
MOM. OFF
“Off” when switch
“Off” when switch
Open when switch
is pressed
is pressed
is pressed
CONTROL Switch in “Remote” Position
SW Setting
Microphone Audio
LED
External Contact Closure
TOUCH ON/OFF
Always “On”
Follows touch-
Follows touch-
sensitive switch
sensitive switch
MOM. ON
Always “On”
“On” when switch
Closed when switch
is pressed
is pressed
MOM. OFF
Always “On”
“Off” when switch
Open when switch
is pressed
is pressed
CONTROL Switch in “LED Remote” Position
SW Setting
Microphone Audio
LED
External Contact Closure
TOUCH ON/OFF
Always “On”
Remotely controlled
Follows touch-
sensitive switch
MOM. ON
Always “On”
Remotely controlled
Closed when switch
is pressed
MOM. OFF
Always “On”
Remotely controlled
Open when switch
is pressed
Switch Settings and Functions
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
0001-0111-01
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.
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 offers a crimp tool (ATCT) and RFI shields that
enable you to shorten the cable and correctly reinstall the connector while
maintaining the highest level of RFI immunity.
Note:
Placing any object on a surface (such as a conference table) before
its finish is fully cured may result in damage to the finish.
Architect’s and Engineer’s Specifications
The microphone shall be a fixed-charge condenser designed for use in
surface-mount applications. It shall have a cardioid polar pattern with a
uniform 120° angle of acceptance (cardioid in hemisphere above mounting
surface) and a frequency response of 30 Hz to 20,000 Hz. It shall be
capable of accepting optional interchangeable elements for additional
polar patterns. It shall operate from an external 11V to 52V DC phantom
power source. The microphone shall be capable of handling sound input
levels up to 130 dB with a dynamic range of 104 dB. Nominal open-circuit
output voltage shall be 19.9 mV at 1V, 1 Pascal. Output shall be low
impedance balanced (200 ohms). It shall offer outstanding rejection of
radio frequency interference (RFI).
The microphone shall feature a touch-sensitive on/off switch, indicator
LED and an external contact closure output for controlling remote devices.
The microphone shall offer three choices of switching modes: touch-
on/touch-off, momentary on, momentary off. A three-position “Local/
Remote/LED Remote” control function switch shall be provided on the
microphone.
The output of the microphone shall be a TB5M-type connector. A 7.6 m
(25') miniature output cable with a TA5F-type connector at microphone
end shall be supplied. The output end of the cable shall have stripped and
tinned color-coded leads for connections. The microphone shall include a
switch to permit choice of flat response or 80 Hz low-frequency roll-off.
The microphone shall have a maximum width of 84.0 mm (3.31"), a
maximum length of 108.0 mm (4.25") and a maximum height of
23.0 mm (0.91"). Weight shall be 266 grams (9.4 oz). The microphone
shall be housed in a die-cast case with a perforated steel grille. Finish
shall be low-reflectance black. The microphone shall include a soft
protective pouch.
The Audio-Technica U891RC is specified.
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