Shure MX300 Series - Manual

GENERAL

Shure Microflex

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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 es-

pecially suitable for picking up speech and vocals in sound re-

inforcement and recording applications. Interchangeable car-

tridges 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 inter-

nal preamplifier.

MX300 Series microphones take advantage of the princi-

ple 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 direct-to-reverberant sound ra-

tio.

FEATURES

·

Flat frequency response across the vocal range for un-

colored sound

·

Interchangeable cardioid, supercardioid, and omni-

directional cartridges that provide choices for applica-

tions

·

Sleek, low-profile design for unobtrusive appearance

·

Balanced transformerless output for increased immunity

to noise over long cable runs

·

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)

MODEL VARIATIONS

·

MX392 Models

:

Surface-mount microphone; in-

cludes a programmable membrane on/off switch, log-

ic input/output terminals, an on/off indicator LED,

screw terminal connections, and attached untermi-

nated cable.

·

MX393 Models

:

Surface-mount microphone; in-

cludes a programmable membrane on/off switch, an

on/off indicator LED, and a miniature, three pin con-

nector.

Selecting a Cartridge

All Microflex microphones are available with any one of

three interchangeable cartridges. The polar pattern of the

original cartridge used in a particular microphone is indi-

cated by the model number suffix:

C = Cardioid, S = Supercardioid, O= Omnidirectional

Cardioid (C).

Recommended for general sound rein-

forcement applications. Pickup angle ( -- 3 dB) = 130

°

.

Supercardioid (S).

Recommended for sound reinforce-

ment applications requiring narrow or more distant cover-

age. 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 re-

sponse and optimum rejection of background noise, place

the microphone on a flat surface that is as large as pos-

sible. The surface can be a floor, table, or lectern.

NOTE:

Avoid locating microphones near reflective sur-

faces other than the boundary surface (i.e., beveled sides
of pulpits or overhanging shelves). Failure to do so will re-
sult 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

Sound reinforcement for

speech and vocals

Lectern, pulpit, stage floor, or

conference table

Hard Wired
Hard Wired

TA3F
TA3F

Hard Wired
Hard Wired

XLR
XLR

Cardioid

Supercardioid

Cardioid

Supercardioid

MX392/C
MX392/S
MX393/C
MX393/S

Recording or remote moni-

toring of speech and vocals

Lectern, pulpit, stage floor, or

conference table

Hard Wired

TA3F

Hard Wired

XLR

Omnidirectional
Omnidirectional

MX392/O
MX393/O

Microflex

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MX300 Series User Guide

Boundary Microphones

27E2834 (CD)

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2003, Shure Incorporated

Printed in U.S.A.