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GENERAL
Shure Microflex
â
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 r ange make them es-
pecially suitable for picking up speech and vocals in sound re-
inforcement and recording applications. Interchangeable car-
tridges provide the ins taller with greater flexibility and make it
possible to easily reconfigure microphone coverage as the
need arises. The MX392 and MX393 models i nclude 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
· Balanc ed transformerless output for increased immunity
to noise over long cable r uns
· Low susceptibility to electromagnetic hum and RF I
· 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 Mo dels: Surface-mount microphone; in-
cludes a programmable membrane on/off switch, log-
ic input/output ter minals, an on/off indicator LED,
screw terminal connec tions, and attached unter mi-
nated cable.
· MX393 Mo dels: Surface-mount mic rophone; in-
cludes a pr ogrammable membrane on/off switch, an
on/off indicator LED, and a miniature, three pin con-
nector.
Selecting a Cartridg e
All Micr oflex mic rophones are av ailable with any one of
three interchangeable cartridges. T he polarpattern ofthe
original cartridge used in a particular microphone is indi-
cated by the model number s uffix:
C = Car dioid, S = Supercardioid, O= Omnidirectional
Cardioid (C). Recommended for general sound rein-
forcement applications. Pickup angle (-- 3 dB) = 130°.
Supercardioid(S).Rec ommendedfor soundreinforce-
ment applications requiring narrow or more distant cover-
age. Pick up 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 andoptimum rejection of background noise, place
the microphone on a flat sur face that is as large as pos-
sible. The sur face can be a floor, table, or lectern.
NOTE: Avoid locating micr ophones near reflectiv e sur-
faces other thanthe boundary surface (i.e., beveled sides
of pulpits or ov erhanging shelves). Failure to doso willr e-
sult in increased leve ls of reverberant s ound.
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 Mi crophones
27E2834 (CD)
ã2003, Shure Incorporated
PrintedinU.S.A.