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U 891 R

The U891R cardioid condenser boundary microphone features a touch-sensitive on-off switch that can be set to three modes: press-on/press-off, press to talk, and press to mute. The phantom-powered microphone is equipped with a unique PivotPoint® rotating output connector and an LED status indicator.

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FEATURES

  • Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing 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"

  • PivotPoint® rotating output connector allows cable to exit from either the rear or the bottom of the microphone

  • Superior off-axis rejection for maximum gain before feedback

  • UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)

  • Small-diameter UniPoint® capsule near boundary eliminates phase distortion and delivers clear, high-output performance

  • Heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone.

SPECIFICATIONS

ELEMENTFixed-charge back plate, permanently polarized condenser
POLAR PATTERNHalf-cardioid 
(cardioid in hemisphere above mounting surface)
FREQUENCY RESPONSE30-20,000 Hz
LOW FREQUENCY ROLL-OFF80 Hz, 18 dB/octave
OPEN CIRCUIT SENSITIVITY–34 dB (19.9 mV) re 1V at 1 Pa
IMPEDANCE200 ohms
MAXIMUM INPUT SOUND LEVEL130 dB SPL, 1 kHz at 1% T.H.D.
DYNAMIC RANGE (TYPICAL)104 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO68 dB, 1 kHz at 1 Pa
PHANTOM POWER REQUIREMENTS11-52V DC, 4 mA typical
SWITCHESTouch-sensitive control: on/off; 
Switch function: touch on/off, momentary on, momentary off; 
Flat, roll-off
WEIGHT9.3 oz (264 g)
DIMENSIONS4.25" (108.0 mm) long, 
3.31" (84.0 mm) maximum width, 
0.91" (23.0 mm) height
OUTPUT CONNECTORTB3M-type
CABLE25.0' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F and XLRM-type connectors
OPTIONAL INTERCHANGEABLE ELEMENTSUE-H hypercardioid (100°); 
UE-O omnidirectional (360°)
ACCESSORY FURNISHEDSoft protective pouch

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