Audio-Technica U851Rb Cardioid Condenser Boundary Microphone, Black

The phantom-powered Audio-Technica U851Rb cardioid condenser boundary microphone offers exceptional speech intelligibility and transparent sound quality. This high-performance microphone is ideal for various surface-mount applications, including high-quality sound reinforcement, professional recording, television, and conferencing. Designed to meet the demands of critical sound pickup situations, the U851Rb features advanced technologies that ensure clear and reliable audio capture.

Equipped with a PivotPoint rotating output connector, this microphone provides flexible cable management, allowing the cable to exit from either the rear or the bottom. The U851Rb's UniSteep filter enhances audio clarity by reducing low-frequency noise, while the UniGuard RFI-shielding technology effectively minimizes radio frequency interference. Additionally, the microphone accepts interchangeable condenser elements, available separately in hypercardioid and omnidirectional polar patterns, providing versatility for different recording environments.

Constructed with a robust die-cast case and non-slip silicon foam bottom pads, the U851Rb minimizes the coupling of surface vibrations to the microphone, ensuring smooth and undisturbed audio capture. The self-contained electronics eliminate the need for an external power module, making it easy to set up and operate. Threaded inserts on the bottom of the microphone allow secure mounting using screws, providing added stability and peace of mind during use.

Key Features

• Cardioid 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 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 need for an external power module
• Heavy die-cast case and non-slip silicon foam bottom pads minimize the 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
• Available in two colors: black (U851Rb) and white (U851RWb)

Specifications

• Element: Fixed-charge back plate, permanently polarized condenser
• Polar Pattern: Cardioid
• Freq. Response: 20-20,000 Hz
• Low Freq. Roll-off: 80 Hz, 18 dB/octave
• Open Circuit Sensitivity: -34 dB (19.9 mV) re 1V at 1 Pa
• Impedance: 50 ohms
• Maximum Input Sound Level: 134 dB SPL, 1 kHz at 1% T.H.D.
• Dynamic Range (typical): 108 dB, 1 kHz at Max SPL
• Signal-to-Noise Ratio: 68 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-H hypercardioid (100 degrees), UE-O omnidirectional (360 degrees)

Package Contents

• Soft protective pouch