Audio-Technica U851RbO Omnidirectional Condenser Boundary Microphone, Black

The phantom-powered Audio-Technica U851RbO omnidirectional condenser boundary microphone delivers outstanding speech intelligibility and transparent sound quality, making it ideal for applications such as high-quality sound reinforcement, professional recording, television, conferencing, and other demanding sound pickup situations. Its advanced features include a PivotPoint rotating output connector, UniSteep filter, and UniGuard RFI-shielding technology. The microphone accepts interchangeable condenser elements, available separately, in cardioid and hypercardioid polar patterns. A heavy die-cast case and silicon foam bottom pads minimize surface vibration coupling to the microphone, ensuring pristine audio quality in any setting.

The U851RbO is equipped with self-contained electronics, negating the need for an external power module. Its low-profile design and low-reflectance finish make it discreet and visually unobtrusive. Threaded inserts on the bottom of the microphone allow for secure mounting with screws, adding to its versatility and practicality in a variety of audio environments.

Key Features

• Omnidirectional condenser boundary microphone
• 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 an angle of acceptance from 100 degrees to 360 degrees
• UniGuard RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
• Self-contained electronics eliminate the need for an 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 the bottom of the microphone allow it to be mounted with screws for increased security

Specifications

• ELEMENT: Fixed-charge back plate, permanently polarized condenser
• POLAR PATTERN: Omnidirectional
• FREQUENCY RESPONSE: 20-20,000 Hz
• LOW FREQUENCY ROLL-OFF: 80 Hz, 18 dB/octave
• OPEN CIRCUIT SENSITIVITY: -31 dB (28.2 mV) re 1V at 1 Pa
• IMPEDANCE: 50 ohms
• 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, A-weighted
• PHANTOM POWER REQUIREMENTS: 11-52V DC, 4.4 mA
• SWITCH: Flat, roll-off
• WEIGHT: 253 g (8.9 oz)
• DIMENSIONS: 0.91" (23.0 mm) H x 3.30" (83.9 mm) W x 4.25" (108.0 mm) D
• OUTPUT CONNECTOR: Microphone: TB3M-type; Cable: 3-pin XLRM-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: UE-C cardioid (120 degrees), UE-H hypercardioid (100 degrees)

Package Contents

• Audio-Technica U851RbO Omnidirectional Condenser Boundary Microphone
• Soft protective pouch