คำอธิบาย
| Microphones | |
|---|---|
| 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 |
| Maximum Input Sound Level | 130 dB SPL, 1 kHz at 1% T.H.D. |
| Dynamic Range | 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; Flat, roll-off |
| Weight | 264 g |
| Cable | 7.6 m (25.0′) long, 3.2 mm (0.13″) diameter, 2-conductor, shielded cable with TA3F-type and XLRM-type connectors |
| Dimensions | 108.0 mm (4.25″) maximum length, 84.0 mm (3.31″) maximum width, 23.0 mm (0.91″) maximum height |
| Output Connector | TB3M-type |
| Accessories Included | Soft protective pouch |
Features
Designed to deliver easy, flexible control in conference and boardroom installations, the versatile U891R cardioid condenser boundary microphone features an activation 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
- An activation 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 silicone foam bottom pads minimize coupling of surface vibration to the microphone
- Low-profile design with low-reflectance finish for minimum visibility
- Improved switch design
- Available in two colors: black (U891Rx) and white (U891RWx)
