Audio-Technica brings to market the new U851RO Omnidirectional Condenser Boundary Microphone. Featuring breakthrough audio and mechanical design innovations, the phantom-powered U851RO offers outstanding speech intelligibility and transparent sound quality for surface-mount applications. Such applications include high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations.
The U851RO’s small-diameter UniPoint® capsule near the boundary eliminates phase distortion and delivers clear, high-output performance. The unit is equipped with a PivotPoint® rotating output connector, allowing the cable to exit from either the rear or the bottom of the microphone; a UniSteep® filter, which provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality; and UniGuard® RFI-shielding technology, which offers outstanding rejection of radio frequency interference. Self-contained electronics eliminate the need for an external power module. It accepts interchangeable condenser elements in cardioid and hypercardioid polar patterns.
The U851RO features a low-profile design with a low-reflectance black finish for minimum visibility, in addition to a heavy die-cast case and silicon foam bottom pads to help minimize coupling of surface vibration to the microphone. The U851RO’s low-profile element provides a uniform omnidirectional polar pattern with a 360-degree acceptance angle.
Fixed-charge back plate, permanently polarized condenser
|Polar Pattern||Omnidirectional in hemisphere above mounting surface|
|Frequency Response||30-20,000 Hz|
|Low Frequency Roll-Off||80 Hz, 18 dB/octave|
|Open Circuit Sensitivity||-31 dB (28.2 mV) re 1V at 1 Pa|
|Maximum Input Sound Level||132 dB SPL, 1 kHz at 1\% T.H.D.|
|Dynamic Range (typical)||111 dB, 1 kHz at Max SPL|
|Signal-to-Noise Ratio||73 dB, 1 kHz at 1 Pa|
|Phantom Power Requirements||11-52V DC, 4 mA typical|
|Weight||9.2 oz (262 g)|
4.25" (108.0 mm) maximum length,
25' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F-type and XLRM-type connectors
|Optional Interchangeable Elements||UE-C cardioid (120°); UE-H hypercardioid (100°)|
|Accessory Furnished||Soft protective pouch|
The U851RO Omnidirectional Condenser Boundary Microphone is currently available with a U.S. MSRP of $313.00. For more information, please visit