Designed to deliver easy, flexible control in conference and boardroom installations, the versatile U891Rx 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. UniGuard® innovations offer unsurpassed immunity from radio frequency interference; interchangeable elements are available in cardioid, hypercardioid and omnidirectional polar patterns; an 80 Hz low-cut UniSteep® filter reduces pickup of low-frequency ambient noise. The microphone’s heavy die-cast case and silicon foam bottom pads minimize coupling of surface vibration to the microphone. The unit’s self-contained electronics eliminate the need for an external power module.
- 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
- Low-profile design with low-reflectance finish for minimum visibility
- Available in two colors: black (U891Rx) and white (U891RWx)
Element | Fixed-charge back plate, permanently polarized condenser
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Polar Pattern | Half-cardioid (cardioid in hemisphere above mounting surface)
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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 | Activation: on/off; Switch function: press on/off, momentary on, momentary off; Flat, roll-off
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Weight | 264 g (9.3 oz)
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Dimensions | 108.0 mm (4.25″) maximum length, 84.0 mm (3.31″) maximum width, 23.0 mm (0.91″) maximum height
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Output Connector | TB3M-type
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Optional Interchangeable Elements | UE-O omnidirectional (360°) UE-H hypercardioid (100°)
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