Audio-Technica U851RbO Omnidirectional Condenser Boundary Microphone

An onmidirectional condenser boundary microphone with transparent sound quality and outstanding speech intelligibility, U851RBO from Audio-Technica is suitable for a variety of demanding surface-mount sound pickup situations. Phantom-powered, it captures sound with the sophisticated UniSteep® filter to reduce pickup of low-frequency (LF) ambient noise, as well as UniGuard® for radio frequency interference (RFI) protection, plus a PivotPoint® rotating connector for easy cable management—no tools required. Durable and discreet, its die-case case houses self-contained electronics which eliminate the need for an external power module — all within a low-profile design. It also comes with silicon foam bottom pads to minimize surface vibration-to-microphone coupling, as well as threaded inserts that enable optional screw-mounting for added security.

Applications

Surface-mount applications in:

High-quality sound reinforcement environments • Professional recording and Television • Conference and Boardrooms • Other demanding sound pickup situations

Includes

• U851RbO microphone
• Soft protective pouch

Features

• Omnidirectional condenser boundary microphone
• Superior off-axis rejection for maximum gain before feedback
• PivotPoint® rotating output connector allows cable to exit from either the rear or the bottom of the microphone
• UniGuard® RFI-shielding technology offers rejection of radio frequency interference (RFI)
• Low-profile design with low-reflectance finish for minimum visibility

Specifications

• Element: Fixed-charge back plate, permanently-polarized condenser
• Polar pattern: Omnidirectional (via the interchangeable UE-O 360° omni element)
• Frequency response: 20 Hz to 20,000 Hz
• Low frequency rolloff: 80 Hz, 18 dB/octave
• Open-circuit sensitivity: -31 dB (28.2 mV) re 1 V @ 1 Pa
• Impedance: 50 Ω
• Maximum input sound level: 132 dB SPL, 1 kHz @ 1% T.H.D.
• Dynamic range (typical): 111 dB, 1 kHz @ Max SPL
• Signal-to-noise ratio: 73 dB, 1 kHz @ 1 Pa, A-weighted
• Phantom power requirements: 11 - 52 VDC, 4.4 mA
• Switch: Flat, rolloff
• Weight: 8.9 oz. (253 g)
• Dimensions (H x W x D): 0.91" x 3.30" x 4.25" (23 x 83.9 x 108mm)
• Output connector:
  • Microphone: TB3M-type
  • Cable : XLR3M-type
• Cable: 25.0' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F and XLRM connectors
• Optional interchangeable elements (sold separately):
  • UE-C cardioid (120°)
  • UE-H hypercardioid (100°)
• Note: further information can be found within the items located under the "Documentation" tab above.