Audio Technica unipoint U891RC Specifications

U891RC
CARDIOID CONDENSER BOUNDARY
MICROPHONE WITH LOCAL OR REMOTE SWITCHING
• PivotPoint ™ rotating output connector allows cable to exit from
either the rear or the bottom of the microphone
• Small-diameter UniPoint capsule near boundary eliminates phase
distortion and delivers clear, high-output performance
• UniGuard ™ RFI-shielding technology offers outstanding rejection
of radio frequency interference (RFI)
• Heavy die-cast case and non-slip silicon foam bottom pads
minimize coupling of surface vibration to the microphone
• Low-profile design with low-reflectance black finish for minimum
visibility
The U891RC requires 11V to 52V phantom power for operation.
Supplied as a cardioid, the U891RC accepts interchangeable
elements to permit selection of angle of acceptance from 100° to
360°.
The electronics in the microphone take up to 30 seconds to stabilize
after power is applied; during this start-up period, some sonic
disturbances may be heard upon switching if the system is "live."
The microphone should be placed on a flat, unobstructed mounting
surface, with the front of the microphone facing the sound source.
The sound source should not be below, or higher than 60° above,
the plane of the mounting surface.
The U891RC features a touch-sensitive on/off
switch, indicator LED and external contact
closure ability for controlling remote devices.
The touch switch can be configured for touch-
60°
IDEAL
on/touch-off, momentary on ("press to talk"),
WORKING
ANGLE
or momentary off ("press to mute"). Slide the
switch marked "SW. FUNCTION" (located on
the bottom of the microphone) to the appropriate mode. The
indicator LED and external contact closure follow the operation of
the touch switch, when in the local mode.
For applications that require the microphone to remain active or
always "on", regardless of the touch switch setting, a "Local/Remote/
LED Remote" control function is provided.
• When the switch marked "CONTROL" (located on the bottom of
the microphone) is in the "Local" position, the touch switch
controls the microphone's audio output, LED status and contact
closure internally.
• When the "CONTROL" switch is in the "Remote" position, the
microphone's audio output remains active or "on" all the time.
The touch switch controls only the LED and contact closure.
• When the "CONTROL" switch is in the "LED remote" position, it
allows remote control of the LED, for accurate depiction of the
microphone's live status. The LED will remain "on" when driven
logic high or open, and "off" when driven logic low or connected to
ground. The microphone's audio output remains active or "on" all
the time, and the contact closure follows the configuration of the
touch switch
*Refer to the table at the right for switch/LED/closure states.
Output is low impedance balanced. The signal appears across the
red and yellow wires; audio ground is the shield connection. Output
is phased so that positive acoustic pressure produces positive
voltage on the yellow wire. The small-diameter black and blue wires
are the contact closure. The white wire is the external LED control.
An integral 80 Hz high-pass filter provides easy switching from a flat
frequency response to a low-end roll-off. The roll-off position
reduces the pickup of low-frequency ambient noise (such as traffic,
air-handling systems, etc.), room reverberation and mechanically
coupled vibrations.
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.
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.
• Designed for surface-mount
applications such as high-
quality sound reinforcement,
conferencing, distance
learning and other demanding
sound pickup situations
• Ultra-quiet electronic switch
can be set to any of three
operating modes:
"touch-on/touch-off,"
"touch-to-talk" and
"touch-to-mute"
• External contact closure
capability permits control of
remote devices from
microphone switch
• External LED control allows for
accurate depiction of the live
status of the microphone
U891RC SPECIFICATIONS †
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
† 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.
Polar Pattern
LEGEND
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
CONTROL Switch in "Local" Position
SW Setting Microphone Audio
TOUCH ON/OFF Follows touch-
sensitive switch
MOM. ON "On" when switch
is pressed
MOM. OFF "Off" when switch
is pressed
CONTROL Switch in "Remote" Position
SW Setting Microphone Audio
TOUCH ON/OFF Always "On"
MOM. ON Always "On"
MOM. OFF Always "On"
CONTROL Switch in "LED Remote" Position
SW Setting Microphone Audio
TOUCH ON/OFF Always "On"
MOM. ON Always "On"
MOM. OFF Always "On"
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P51704 ©2005 Audio-Technica U.S., Inc.
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
9.4 oz (266 g)
4.25" (108.0 mm) long,
3.31" (84.0 mm) maximum width,
0.91" (23.0 mm) height
TB5M-type
25,0' (7.6 m) long, 0.13" (3.2 mm)
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-H hypercardioid (100°);
UE-O omnidirectional (360°)
Soft protective pouch
Frequency Response
Frequency in Hertz
12" or more on axis
Roll-off
LED External Contact
Closure
Follows touch- Follows touch-
sensitive switch sensitive switch
"On" when switch Closed when switch
is pressed is pressed
"Off" when switch Open when switch
is pressed is pressed
LED External Contact
Closure
Follows touch- Follows touch-
sensitive switch sensitive switch
"On" when switch Closed when switch
is pressed is pressed
"Off" when switch Open when switch
is pressed is pressed
LED External Contact
Closure
Remotely controlled Follows touch-
sensitive switch
Remotely controlled Closed when switch
is pressed
Remotely controlled Open when switch
is pressed
Printed in U.S.A.