Audio-Technica U851RB Condenser Boundary Microphone

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SoundPro Item: 42211

MPN: U851RB

Description
Specifications
Documentation

The Audio-Technica U851RB Condenser Boundary Microphone is available in different colors and polar patterns. Each option has a 25.0' (7.6 m) cable with TA3F connector at the microphone and XLRM output connector.

The phantom-powered U851Rb condenser boundary microphone offers outstanding speech intelligibility and transparent sound quality for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing, and other demanding sound pickup situations. The microphone is equipped with a PivotPoint® rotating output connector, UniSteep® filter, and UniGuard® RFI-shielding technology. With a heavy die-cast case and silicon foam bottom pads to minimize coupling of surface vibration to the microphone, the U851Rb is equipped with self-contained electronics, eliminating the need for an external power module. Threaded inserts on the bottom of the microphone allow it to be mounted with screws for increased security.

Audio-Technica U851RB Features

Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
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
Small-diameter UniPoint® element near boundary eliminates phase distortion and delivers clear, high-output performance
Available interchangeable elements permit angle of acceptance from 100° to 360°
UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
Self-contained electronics eliminate need for external power module
Heavy die-cast case and non-slip silicone foam bottom pads minimize coupling of surface vibration to the microphone
Low-profile design with low-reflectance finish for minimum visibility
Threaded inserts on bottom of microphone allow it to be mounted with screws for increased security

Microphone Configurations

U851Rb: cardioid polar pattern (120° acceptance angle), black finish
U851RWb: cardioid polar pattern (120° acceptance angle), white finish
U851RbO: omnidirectional polar pattern (360° acceptance angle), black finish

U851RB Condenser Boundary Microphone1
Soft protective pouch1
Two Year Limited End User Warranty1

Transducer TypeCondenser
Polar PatternsCardioid and Omnidirectional
Frequency Response20 Hz - 20 kHz
Output Impedance50 ohms
Low Frequency Roll Off80 Hz, 18 dB/octave
Open Circuit Sensitivity-34 dB (19.9 mV) re 1V at 1 Pa
Maximum Input Sound Level134 dB SPL, 1 kHz at 1% T.H.D.
Dynamic Range108 dB, 1 kHz at Max SPL
Signal-to-Noise Ratio68 dB, 1 kHz at 1 Pa, A-weighted
Phantom Power Requirements11-52V DC, 4.4 mA
SwitchesFlat, roll-off
Weight253 g (8.9 oz)
Cable25 feet (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F and XLRM connectors
Dimensions0.91" (23 mm) H x 3.3" (83.9 mm) W x 4.25" (108 mm) D
Output ConnectorMicrophone: TB3M-type Cable: 3-pin XLRM-type