PRODUCTS

Product Description

U851R

CARDIOID CONDENSER BOUNDARY MICROPHONE

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.

• Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations


• PivotPoint^® rotating output connector allows cable to exit from either the rear or the bottom of the microphone


• Superior off-axis rejection for maximum gain before feedback


• UniGuard^® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)


• Self-contained electronics eliminate need for external power module


• Small-diameter UniPoint capsule near boundary eliminates phase distortion and delivers clear, high-output performance


• Heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone


• Low-profile design with low-reflectance black finish for minimum visibility


• Available in two colors: black (U851R) and white (U851RW)

Specifications

Element	Polarized condenser
Polar Pattern	Half-cardioid (cardioid in hemisphere above mounting surface)
Frequency Response	30 – 20,000 Hz
Open Circuit Sensitivity	-34 dB (19.9 mV) re 1V at 1 Pa
Impedance	200 ohms
Maximum Input Sound Level	134 dB, 1 kHz at 1% T.H.D.
Low Frequency Roll Off	80 Hz, 18 dB/octave
Switches	Flat, roll-off
Dynamic Range	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
Weight	9.2 oz (262 g)
Dimensions	4.25″ (108.0 mm) long, 3.31″ (84.0 mm) maximum width, 0.91″ (23.0 mm) height
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
Accessories Included	Soft protective pouch