Audio-Technica U851Rb Users Manual

U851Rb/U851RWb

User Manual

CARDIOID CONDENSER BOUNDARY MICROPHONE

Introduction

Thank you for purchasing this product. Before using the product, read through the user manual to ensure that you will use the product correctly. Please keep this manual for future reference.

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™ capsule near boundary eliminates phase distortion and delivers clear, high-output performance

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

•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

•Available in two colors: black (U851Rb) and white (U851RWb)

Connection procedure

Connect the output terminals of the microphone to a device that has a microphone input (balanced input) compatible with a phantom power supply. The output connector is an XLRM-type with polarity as shown in the ﬁgure below.

Output terminals

PIN1 (ground)

PIN3 (cold)

1 2

PIN2 (hot)

This product requires phantom power.

Polar pattern

300˚

270˚

240˚

SCALE IS 5 DECIBELS PER DIVISION

Frequency response

50 100 200 500 1k 2k 5k 10k 20k20

LEGEND

Dimensions

50.2

0˚

330˚

210˚

180˚

Frequency in Hertz

0°, 50 cm 0°, 50 cm, Low cut

150˚

30˚

60˚

LEGEND

200Hz

90˚

1kHz 5kHz 8kHz

120˚

10 dB

Specifications

Element

Polar pattern Cardioid

Frequency response 20 - 20,000 Hz

Low frequency roll-o 80 Hz, 18 dB/octave

Open circuit sensitivity -34 dB (19.9 mV) (0dB=1V/Pa, 1kHz)

Impedance 50 ohms

Maximum input sound level 134 dB SPL (1kHz at 1% THD)

Dynamic range 108 dB (1kHz at Max SPL)

Signal-to-noise ratio 68 dB (1kHz at 1Pa, A-weighted)

Phantom power requirements 11 - 52 V DC, 4.4 mA

Switches Low cut: on/off

Dimensions

Output connector

Optional interchangeable elements UE-O omnidirectional (360°), UE-H hypercardioid (100°)

Included accessories

• 1 Pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL

For product improvement, the product is subject to modiﬁcation without notice.

Fixed-charge back plate, permanently polarized condenser

Noise 26 dB SPL (A-weighted)

Weight 253 g (8.9 oz)

23 mm (0.91") × 83.9 mm (3.3") × 108 mm (4.25") (H×W×D) TB3M-type (Microphone) 3-pin XLRM-type (Cable)

U851Rb: 7.6 m (24.9') Microphone black cable (TA3F, XLRM), Pouch U851RWb: 7.6 m (24.9') Microphone white cable (TA3F, XLRM), Pouch

108

2-M3 P=0.5

83.9

Included accessories

Audio-Technica Corporation

Global Support Contact: www.at-globalsupport.com

Made in Japan

(Unit: mm)

142419863-01-01 ver.1 2019.01.15