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audio-technica U891RC | Boundary Local/Remote Switching, CardioidSKU: U891RCx
Features:
Cardioid Condenser Boundary Microphone with Local or Remote Switching
A wide range condenser microphone with a cardioid polar pattern, the ultra-smart U891RC is equipped with local or remote switching options. For flexible control in conference and boardroom installations, the unit’s external contact closure ability allows a user to trigger an external device—a camera, for instance—from a switch on the microphone. Another ease-of-use feature: the microphone’s electronic on-off switch can be set to three operating modes: touch-on/touch-off, press to talk, and press to mute. The mic is also equipped an 80 Hz low-cut UniSteep® filter to reduce pickup of low-frequency ambient noise. Its red LED status indicator can be controlled remotely. UniGuard™ innovations offer unsurpassed immunity from radio frequency interference; interchangeable elements are available in cardioid, hypercardioid and omnidirectional polar patterns; a unique rotating PivotPoint™ connector changes the cable exit point—no tools required. It requires 11 to 52V DC phantom power, which operates the microphone and switch circuitry.
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Designed for surface-mount applications such as high-quality sound reinforcement, conferencing, distance learning and other demanding sound pickup situations
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Ultra-quiet electronic switch can be set to any of three operating modes: “touch-on/touch-off,” “touch-to-talk” and “touch-to-mute”
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External contact closure capability permits control of remote devices from microphone switch
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External LED control allows for accurate depiction of the live status of the microphone
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PivotPoint™ rotating output connector allows cable to exit from either the rear or the bottom of the microphone
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Small-diameter UniPoint capsule near boundary eliminates phase distortion and delivers clear, high-output performance
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UniGuard™ RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
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Heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone
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Low-profile design with low-reflectance black finish for minimum visibility
Pivot Point

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Specifications
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ELEMENT |
Fixed-charge back plate, permanently polarized condenser |
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POLAR PATTERN |
Half-cardioid
Fixed-charge back plate, permanently polarized condenser |
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FREQUENCY RESPONSE |
30-20,000 Hz |
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LOW FREQUENCY ROLL-OFF |
80 Hz, 18 dB/octave |
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OPEN CIRCUIT SENSITIVITY |
–34 dB (19.9 mV) re 1V at 1 Pa |
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IMPEDANCE |
200 ohms |
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MAXIMUM INPUT SOUND LEVEL |
130 dB SPL, 1 kHz at 1% T.H.D. |
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DYNAMIC RANGE (typical) |
104 dB, 1 kHz at Max SPL |
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SIGNAL-TO-NOISE RATIO |
68 dB, 1 kHz at 1 Pa |
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PHANTOM POWER REQUIREMENTS |
11-52V DC, 4 mA typical |
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SWITCHES |
Touch-sensitive control: on/off;
Switch function: touch on/off, momentary on, momentary off;
Control: local, remote, LED remote;
Flat, roll-off |
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WEIGHT |
9.4 oz (266 g) |
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DIMENSIONS |
4.25" (108.0 mm) long,
3.31" (84.0 mm) maximum width,
0.91" (23.0 mm) height |
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OUTPUT CONNECTOR |
TB3M-type |
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CABLE |
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 |
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OPTIONAL INTERCHANGEABLE ELEMENTS |
UE-H hypercardioid (100°);
UE-O omnidirectional (360°) |
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ACCESSORIES FURNISHED |
Soft protective pouch |
* All written material on this page is supplied by www.audio-technica.com.

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