Condenser Boundary Microphone

U851Rb

Overview

U851Rb Condenser Boundary Microphone

The phantom-powered U851Rb condenser boundary microphone offers outstanding speech intelligibility and transparent sound quality for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing, and other demanding sound pickup situations. The microphone is equipped with a PivotPoint® rotating output connector, UniSteep® filter, and UniGuard® RFI-shielding technology. It accepts interchangeable condenser elements – omnidirectional (360°), cardioid (120°), and hypercardioid (100°) – available separately. With a heavy die-cast case and silicon foam bottom pads to minimize coupling of surface vibration to the microphone, the U851Rb is equipped with self-contained electronics, eliminating the need for an external power module. Threaded inserts on the bottom of the microphone allow it to be mounted with screws for increased security.

Available configurations:

U851Rb: cardioid polar pattern (120° acceptance angle); 25.0' (7.6 m) cable with TA3F connector at the microphone and XLRM output connector; black finish.

U851RWb: cardioid polar pattern (120° acceptance angle); 25.0' (7.6 m) cable with TA3F connector at the microphone and XLRM output connector; white finish.

U851RbO: omnidirectional polar pattern (360° acceptance angle); 25.0' (7.6 m) cable with TA3F connector at the microphone and XLRM output connector; black finish.

Features

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° to 360°
UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
Self-contained electronics eliminate need for 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 bottom of microphone allow it to be mounted with screws for increased security

Specifications

Microphones
Element	Fixed-charge back plate, permanently polarized condenser
Frequency Response	20-20,000 Hz
Low Frequency Roll Off	80 Hz, 18 dB/octave
Open Circuit Sensitivity	-34 dB (19.9 mV) re 1V at 1 Pa
Maximum Input Sound Level	134 dB SPL, 1 kHz at 1% T.H.D.
Dynamic Range	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
Switches	Flat, roll-off
Weight	253 g (8.9 oz)
Cable	25.0' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F and XLRM connectors
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
Optional Interchangeable Elements	UE-C cardioid (120°), UE-H hypercardioid (100°), UE-O omnidirectional (360°)
Accessories Included	Soft protective pouch

Downloads

U851Rb Dimensions

U851Rb Specification Sheet

User Manual

Quick Start Guide

U851Rb User Manual (it)

U851Rb User Manual (pt)

U851Rb User Manual (ru)

U851RbO Specification Sheet

U851RbO Dimensions

User Manual

Quick Start Guide

U851RbO User Manual (it)

U851RbO User Manual (pt)

U851RbO User Manual (ru)

U851RWb Dimensions

U851Rb Specification Sheet

U851Rb User Manual (it)

U851Rb User Manual (pt)

U851Rb User Manual (ru)