Audio-Technica U851RB Cardioid condenser boundary microphone with integral power module, phantom power only

Product Overview

The Audio-Technica U851RB is a cardioid condenser boundary microphone with an integral power module, engineered for conferencing, presentation, and installed sound reinforcement. Its low-profile boundary housing sits flat on a table or lectern to capture clear, natural speech while rejecting off-axis noise. A PivotPoint rotating output connector and UniGuard RFI shielding support clean cabling and interference-free performance. The black finish keeps the microphone discreet on conference surfaces.

Product Description

The U851RB boundary microphone delivers transparent speech pickup for surface-mount commercial AV applications.

Its fixed-charge back plate, permanently polarized condenser element produces a 20-20,000 Hz frequency response with high speech intelligibility and a cardioid polar pattern that rejects ambient room noise. The integral power module runs on standard 11-52V DC phantom power, and a switchable roll-off filter reduces low-frequency pickup when needed. UniGuard RFI-shielding technology protects against radio-frequency interference from wireless systems and mobile devices. The PivotPoint rotating output connector lets integrators route cable cleanly beneath or behind the mounting surface. Its heavy, low-profile design minimizes surface-vibration pickup and keeps the unit discreet on a conference table or podium. AV integrators specifying surface-mount conferencing microphones can review the U851RB boundary microphone alongside related installed-sound hardware at Creation Networks. The black housing blends into dark table and lectern surfaces for unobtrusive coverage.

Key Features

• Cardioid Boundary Pickup — The cardioid element captures clear, natural speech across a table or lectern while rejecting off-axis noise.
• Integral Power Module — The built-in module runs on standard 11-52V DC phantom power for straightforward installation.
• Switchable Roll-Off Filter — A flat or roll-off switch reduces pickup of low-frequency ambient noise when required.
• UniGuard RFI Protection — UniGuard technology provides strong immunity from radio-frequency interference.
• PivotPoint Output Connector — The rotating connector allows clean cable routing beneath or behind the mounting surface.
• Low-Profile Black Design — The heavy, discreet housing minimizes surface-vibration pickup and blends into dark surfaces.

Technical Specifications

Specifications sourced from Audio-Technica (audio-technica.com).