Three-Element Multidirectional Boundary Microphone U843R Multidirectional boundary microphone with three cardioid condenser elements in a single housing and an integral power module, phantom power only Overview U843R With three cardioid condenser elements in a single housing, the phantom-powered U843R offers a remarkably versatile tool for surface-mount installations. It is ideal for a variety of video and audio conferencing applications, especially when used with an Audio-Technica automatic SmartMixer®. Levers on the microphone base allow easy reorientation of two elements to offer 360° or 300° coverage. Since elements can be powered and used individually or in any combination, further flexibility is easily achieved. For example, with two elements powered, the microphone can provide a figure-of-eight polar pattern; with a single element powered, the microphone functions as a standard cardioid boundary microphone. Installation and repositioning are extremely quick, thanks to four recessed pathways on the base of the microphone that enable the user to route the cable as required to accommodate any installation requirements; no tools or disassembly are needed. The microphone also offers Audio-Technica’s innovative UniGuard® RFI-shielding technology. Features Three cardioid condenser elements mounted in a single housing Easily reposition two elements (via levers on the microphone base) to offer 360° or 300° coverage; each element can be powered and used individually or in any combination Also functions as a stereo boundary microphone Provides full, efficient and flexible coverage – fewer microphones required Small-diameter capsules near boundary eliminate phase distortion and deliver clear, high-output performance Low-frequency attenuation improves sound pickup without affecting voice quality Cable routes through any of four recessed pathways on the microphone base (or down for direct feed through a table surface); no tools or disassembly required UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI) Heavy die-cast case and non-slip silicone foam bottom pad minimizes coupling of surface vibration to the microphone Low-profile design with low-reflectance finish for minimum visibility U843R is ideal for a variety of video and audio conferencing applications, especially when used with an Audio-Technica automatic SmartMixer® Specifications Microphones Element Fixed-charge back plate, permanently polarized condenser Polar Pattern Cardioid x 3 Frequency Response 75-15,000 Hz Low Frequency Roll Off 80 Hz, 18 dB/octave Open Circuit Sensitivity -37 dB (14.1 mV) re 1V at 1 Pa Maximum Input Sound Level 134 dB SPL, 1 kHz at 1% T.H.D. Dynamic Range 105 dB, 1 kHz at Max SPL Signal-to-Noise Ratio 65 dB, 1 kHz at 1 Pa Phantom Power Requirements 11-52V DC, 2 mA typical Switches The lever of elements can adjust the proper position Weight 160 g (5.6 oz) Cable 7.6 m (24.93') long, Unterminated-type, Permanently attached to microphone Dimensions 20.0 mm - height ; 85.0 mm – maximum body diameter Dimensions (Microphone) 85.0 mm (3.35") diameter, 20.0 mm (0.79") height Output Connector Unterminated – stripped and tinned Accessories Included Soft protective pouch
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