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Audio-Technica U843R Boundary Microphone

Product Code AUU843R
Manufacturer Audio-Technica

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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.


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


Element: 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

Impedance: 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

Switch: The lever of elements can adjust the proper position

Weight (Less Cable): 160 g

Dimensions: 20.0 mm - height 

85.0 mm – maximum body diameter

Cable: 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

Equipment available to buy from this site is for professional use only. Please note in certain countries some products listed may not be available from A.C. Entertainment Technologies Ltd.

E&OE. Information is subject to change without notice. The rights and ownership of all trademarks are recognised.


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