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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 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 ap-
proximately 3 dB greater direct-to-reverberant sound ratio.
FEATURES
•
Flat frequency response across the vocal range for
uncolored sound
•
Interchangeable cardioid, supercardioid, and omnidi-
rectional cartridges that provide choices for applications
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
unterminated cable.
• MX393 Models: Surface-mount microphone; in-
cludes a programmable membrane on/off switch, an
on/off indicator LED, and a Switchcraft Tini Q-G
connector.
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
indicated 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
Tini Q-G
Tini Q-G
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
Tini Q-G
Hard Wired
XLR
Omnidirectional
Omnidirectional
MX392/O
MX393/O
Video conferencing or
computer telephony
Lecturn, pulpit, stage floor, or
conference table
Hardwired
Tini Q-G
Cardioid MX392/CZ
Microflex
MX300 Series User Guide
Boundary Microphones
27C2834 (TJ)
2000, Shure Incorporated
Printed in U.S.A.