Shure Microflex MX300 series User Manual Download

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Microflex

MX300 Series User Guide

Boundary Microphones

2007, Shure Incorporated

27G2834 (Rev. 3)

Printed in U.S.A.

GENERAL

Shure Microflex

MX300 Series microphones are surface-mounted

electret condenser microphones designed primarily for mounting on
conference tables, stage floors, and lecterns. Their high sensitivity
and wide frequency range make them especially suitable for picking
up speech and vocals in sound reinforcement and recording
applications. Interchangeable cartridges provide the installer with
greater flexibility and make it possible to easily reconfigure
microphone coverage as the need arises. The MX392 and MX393
models include an internal preamplifier.
MX300 Series microphones take advantage of the principle that, at
a barrier or boundary, the sound pressure level doubles. When
placed near a sufficiently large boundary surface, the microphone
has 6 dB higher sensitivity and approximately 3 dB greater di-
rect-to-reverberant sound ratio.

FEATURES

•

Flat frequency response across the vocal range for uncolored

sound

•

Interchangeable cardioid, supercardioid, and omnidirectional

cartridges that provide choices for applications

•

Sleek, low-profile design for unobtrusive appearance

•

Low susceptibility to electromagnetic hum and RFI

•

Programmable on/off switch and LED on/off indicator

•

Logic input/output terminals for remote control or use with

automatic mixers (MX392 models only)

•

New RF filtering

MODEL VARIATIONS

•

MX392 Models

: Surface-mount microphone; includes a pro-

grammable membrane on/off switch, logic input/output termi-

nals, an on/off indicator LED, screw terminal connections, and

attached 3.7 m (12 ft.) unterminated cable.

•

MX393 Models

: Surface-mount microphone; includes a pro-

grammable membrane on/off switch, an on/off indicator LED,

a miniature, three pin connector, and detachable 3.7 m (12 ft.)

cable.

SELECTING A CARTRIDGE

All Microflex microphones are available with any one of three inter-
changeable cartridges. The polar pattern of the original cartridge
used in a particular microphone is indicated by the model number
suffix:

Cardioid

(C).

Recommended for general sound reinforcement ap-

plications. Pickup angle (-3 dB) = 130

Supercardioid (S).

Recommended for sound reinforcement appli-

cations requiring narrow or more distant coverage. Pickup angle
(-3 dB) = 115

Omnidirectional (O).

Recommended for recording or remote

monitoring applications. Pickup angle (-3 dB) = 360

MICROPHONE PLACEMENT

To maintain the flattest possible low-frequency response and opti-
mum rejection of background noise, place the microphone on a flat
surface that is as large as possible. The surface can be a floor, ta-
ble, or lectern.

NOTE:

Avoid locating microphones near reflective surfaces other than the

boundary surface (i.e., beveled sides of pulpits or overhanging shelves).
Failure to do so will result in increased levels of reverberant sound.

MICROPHONE APPLICATION AND SELECTION GUIDE

Application

Mounting Surface

Microphone to

Cable Connector

Cable Output

Connector

Polar Pattern

Microflex Model