audio-technica U843R Three-Element Multidirectional Boundary Microphone

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Category: audio-technica, Pro-Audio-Installation-Sound-Boundary

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With three cardioid condenser elements in a single housing, the phantom-powered U843R offers a remarkably versatile tool for surface-mount installations. 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.


Fixed-charge back plate, permanently polarized condenser


Polar Pattern

Hemispherical Cardioid x3 (combine to omni-directional or bidirectional)


Frequency Response

70-16,000 Hz


Open Circuit Sensitivity

 –37 dB (14.1 mV) re 1V at 1 Pa



100 ohms


Maximum Input Sound Level

134 dB SPL, 1 kHz at 1% T.H.D.


Dynamic Range (Typical)

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



The lever of elements can adjust the proper position


Weight (Less Cable)

160 g



20.0 mm – height 

85.0 mm – maximum body diameter



7.6 m long (permanently attached to microphone), 4 mm diameter, 6 conductor, shielded cable; output end stripped and tinned for connection to electronic device


Accessories Furnished

Soft protective pouch


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