• 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
• Self-contained electronics eliminate need for external power module
• Small-diameter UniPoint capsule near boundary eliminates phase distortion and delivers clear, high-output performance
• Low-profile design with low-reflectance finish for minimum visibility

Featuring breakthrough audio and mechanical design innovations, the phantom-powered U851R offers outstanding speech intelligibility and transparent sound quality for surface-mount applications. The microphone is equipped with a PivotPoint® rotating output connector, UniSteep® filter and UniGuard® RFI-shielding technology. It accepts interchangeable condenser elements - available for boundary microphones in cardioid, hypercardioid and omnidirectional polar patterns. With a heavy die-cast case and silicon foam bottom pads to minimize coupling of surface vibration to the microphone, the U851R is equipped with self-contained electronics, eliminating the need for an external power module.

General

• ELEMENT: Fixed-charge back plate, permanently polarized condenser
• POLAR PATTERN: Half-cardioid (cardioid in hemisphere above mounting surface)
• FREQUENCY RESPONSE: 30-20,000 Hz
• LOW FREQUENCY ROLL-OFF: 80 Hz, 18 dB/octave
• OPEN CIRCUIT SENSITIVITY: –34 dB (19.9 mV) re 1V at 1 Pa
• IMPEDANCE: 200 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
• PHANTOM POWER REQUIREMENTS: 11-52V DC, 4 mA typical
• SWITCH: Flat, roll-off
• OUTPUT CONNECTOR: TB3M-type
• CABLE: 25.0' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F and XLRM-type connectors

Physical & Dimensions

• Length: 108mm
• Max. Width: 84mm
• Height: 23mm
• Weight: 262g