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Description:

Manufacturer's website

U891RCx Cardioid Condenser Boundary Microphone with Local or Remote Switching

A wide range condenser microphone with a cardioid polar pattern, the U891RCx 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 activation 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.

- Designed for surface-mount applications such as high-quality sound reinforcement, conferencing, distance learning and other demanding sound pickup situations
- An activation 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
- 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 silicone foam bottom pads minimize coupling of surface vibration to the microphone
- Low-profile design with low-reflectance black finish for minimum visibility
- Improved switch design

SPECIFICATIONS
ELEMENT	Fixed-charge back plate, permanently polarized condenser
POLAR PATTERN	Half-cardioid (cardioid in hemisphere above mounting surface)
FREQUENCY RESPONSE	30-20,000 Hz
LOW FREQUENCY ROLL-OFF	80 Hz, 18 dB/octave
OPEN CIRCUIT SENSITIVITY	–34 dB (19.9 mV) re 1V at 1 Pa
IMPEDANCE	200 ohms
MAXIMUM INPUT SOUND LEVEL	130 dB SPL, 1 kHz at 1 percent T.H.D.
DYNAMIC RANGE (typical)	104 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO	68 dB, 1 kHz at 1 Pa
PHANTOM POWER REQUIREMENTS	11-52V DC, 4 mA typical
SWITCHES	Activation: on/off; Switch function: press on/off, momentary on, momentary off; Control: local, remote, LED remote; Flat, roll-off
WEIGHT	266 g (9.4 oz)
DIMENSIONS	108.0 mm (4.25 inches) maximum length, 84.0 mm (3.31 inches) maximum width, 23.0 mm (0.91inches) maximum height
OUTPUT CONNECTOR	TB5M-type
CABLE	7.6 m (25.0 feet) long, 3.2 mm (0.13 inch) 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
OPTIONAL INTERCHANGEABLE ELEMENTS	UE-O omnidirectional (360 degrees) UE-H hypercardioid (100 degrees)
ACCESSORY FURNISHED	Soft protective pouch

SPECIFICATION GRAPHS
Click on the chart to view the larger image
	POLAR PATTERN
	FREQUENCY RESPONSE

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Alternate part numbers and similar products: AT-U891RCx