| Audio Technica U891R Cardioid Condenser Boundary Microphone Details
The Audio Technica U891R Cardioid Condenser Boundary Microphone is designed to deliver easy, flexible control in conference and boardroom installations. The versatile Audio Technica 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. 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 Audio Technica U891R Cardioid Condenser Boundary 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.
Audio Technica U891R Cardioid Condenser Boundary Microphone 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
- Low-profile design with low-reflectance finish for minimum visibility
- Available in two colors: black (U891R) and white (U891RW)
Audio Technica U891R Cardioid Condenser Boundary Microphone 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% 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
- Switch: Touch-sensitive control: on/off; Switch function: touch on/off, momentary on, momentary off; Flat, roll-off
- Weight: 9.3 oz (264 g)
- Dimensions: 4.25" (108.0 mm) long, 3.31" (84.0 mm) maximum width, 0.91" (23.0 mm) height
- Output Connector: TB3M-type
- Cable: 25.0' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F and XLRM-type connectors
- Optional Interchangeable Elements: UE-H hypercardioid (100°); UE-O omnidirectional (360°)
- Accessories Furnished: Soft protective pouch
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