Shure Microflex MX300 series User manual

© 2015 Shure Incorporated
27A30137 (Rev. 1)
MICROFLEX WIRED MICROPHONES
MX300 SERIES
USER GUIDE
Le Guide de l’Utilisateur
Guia del Usuario
Guida dell’Utente
Bedienungsanleitung
取扱説明書
Manual do Usuário
Printed in U.S.A.
MX392 MX392BE MX393

3
Shure Microflex®MX300 Series microphones are surface-mounted electret condenser microphones
designed primarily for mounting on conference tables, stage floors, and lecterns. Their high sensi-
tivity 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 direct-to-reverberant sound ratio.
MX392-MX392BE-MX393
Boundary Microphones
Features
The MX392, MX392BE, and MX393 feature pro-
grammable logic input and output. Additionally
they provide following benefits:
• Flat frequency response across the vocal
range for uncolored sound
• Interchangeable cartridges that provide a
choice of polar pattern for each application
• Sleek, low-profile design for surface mounting
• Programmable mute button
• LED indicator
• Logic input/output for remote control or use
with automatic mixers
• RF filtering
Model Variations
MX392: Attached, unterminated cable.
MX392BE: Attached, unterminated cable
configured at the factory for bottom exit.
MX393: Detachable cable with XLR output
connector.
The polar pattern of the included cartridge is
indicated by a model number suffix:
/C Cardioid
/S Supercardioid
/O Omnidirectional
/N Cartridge not included
Remove Grille
Remove Bracket
Cartridge
Permanent Installation
MX392 and MX393
1. Remove grille to access mounting key holes.
2. Cut slots into pads.
3. Slide microphone forward to engage screws
in slots.
Note: If using rear side-exit cable option, only
drill two outer holes.
②
③
Microphone Placement
For best low-frequency response and rejection
of background noise, place the microphone on
a large, flat surface, such as a floor, table, or
lectern.
To reduce reverberance, avoid reflective sur-
faces above or to the side of the microphone,
such as beveled sides of pulpits or overhanging
shelves.
Interchangeable Cartridges
115º
115º
115º
Microflex microphones use interchangeable
cartridges that allow you to choose the polar
pattern for different installations.
R183
R184
R185
Omnidirectional
Supercardioid
Cardioid
Cartridge Polar Patterns

4
Once placement has been determined, the microphones can be permanently installed. First, drill the
hole in the selected area to allow the bottom entry cable to be conveniently routed out of sight. Then
use the pressure sensitive adhesive to keep the microphone firmly in place.
Drilling the hole:
1. Determine the cutting area for the bottom exit cable and drill a 1/2" (12.7 mm) circular hole.
Remove all debris from the mounting surface.
2. Route the cable through the drilled hole.
3. Connect the integrated XLR cable to a mixer or P.A. system.
Pressure Sensitive Adhesive
Re-Routing Cable for Bottom Exit (If your
MX392 is not BE configured)
②
⑧
⑤
⑥
③
MX392BE
1. Remove the grille.
2. Disconnect wires from screw terminals.
3. Grasp rubber boot within 1/2" of housing, us-
ing gas pliers. Rotate boot and cable ccw to
remove connector from threaded "L" bracket.
4. Remove cable from microphone housing.
5. Insert cable through access hole in micro-
phone base.
6. Insert cable connector through hole and
thread it into "L" bracket.
7. If desired, rubber strain relief can be reat-
tached to cable end or removed from cable
before fastening it to bracket.
8. Re-connect wires to proper screw terminals
on circuit board.
9. Insert supplied round rubber plug into unused
side cable exit.
10. Reinstall grille and foam screen.
11. Insert cable through hole in mounting
surface. Secure microphone to mounting
surface.
1. Thoroughly clean the application area with the included alcohol wipe. Removing the dust will allow
the microphone to adhere well.
2. Remove the adhesive backing and gently set the microphone into position.
3. Once the microphone is in position, firmly apply pressure to the microphone.
Note: The pressure sensitive adhesive will be extremely difficult to move once pressure has been
applied.
MX392BE/C
MICROFLEX
Bottom view of MX392BE/C with adhesive pads
12.7 mm
(1/2 in.)
① ② ③

5
Configuration
DIP Switches
Use the DIP switches to configure logic settings
and mute button behavior.
The DIP switches are covered with a piece of
clear tape at the factory. Remove tape to modify
the switch settings.
Note: Bottom cover must be closed for micro-
phone to function.
OFF (factory
default)
ON
1 Momentary Toggle
2 Push-to-mute Push-to-talk
3 Mute button enabled,
LED illuminates when
mic is active
Disable mute button
(microphone always
on), logic controls
LED
4 -- --
Wiring Diagram
NOTE: Audio and logic ground are connected at
microphone base.
Ground (Green)
SWITCH OUT (White)
LED IN (Orange)
Audio + (Red)
Audio – (Black)
Use DIP switches 1 and 2 to configure the mute
button, as follows.
Be sure to set DIP switch 3 off (factory default)
so that the mute button controls audio from the
microphone.
Switch Function DIP Switch Setting
Momentary: push-to-mute
(as shipped).
Momentary: push-to-talk
Toggle: (Push On/Push
Off): Mic is active when
powered on
Toggle: (Push On/Push
Off): Mic is mute when
powered on
Connecting to an Automatic
Mixer
Use these settings if connecting the microphone
to an automatic mixer or other device that mutes
audio and controls the LED.
1. Connect logic leads to the automatic mixer.
Connect the LED IN to the gate output to
illuminate the LED when that channel is gated
on.
2. Set DIP switch 3 on. This disbles the mute
button (the microphone passes audio regard-
less of whether the button is pressed or not).
3. Set DIP switch 1 to configure how the mute
button sends SWITCH OUT logic:
Momentary:
push = 0 Vdc,
release = 5 Vdc
Toggle:
initial = 5 Vdc,
push = 0 Vdc
Logic Wiring (MX392)
Changing SWITCH OUT to
Always Momentary
Use the following modification in situations
where your logic interface requires momentary
closure of the SWITCH OUT, but you want the
mute button to toggle the microphone (DIP
switch 1 ON, 3 OFF):
1. Access the circuit board inside the micro-
phone base.
2. Remove the resistor at R45 and reinstall it at
location R46.
Green (LOGIC GROUND): Connects to the
logic ground of an automatic mixer, switcher, or
other equipment.
Orange (LED IN): Set DIP switch 3 on to use
LED IN. When shorted to LOGIC GROUND, the
LED turns on.
White (SWITCH OUT): Provides TTL logic
(0 Vdc or 5 Vdc) in response to the mute button.
Set DIP switch 1 for momentary or toggle. When
phantom power is applied, logic initializes high
(5 Vdc). DIP switch 2 has no effect on SWITCH
OUT.
Mute Button Configuration

6
Painting
Asupplied plastic paint shield
Bretainer
Cgrille
Dfoam screen
Esupplied adhesive masking strip
Fsupplied rubber plug
A
B
C
D
E
F
1. Remove foam screen from grille before
painting
2. Clean surfaces to be painted with denatured
alcohol or naphtha.
3. To avoid filling grille holes, apply paint in thin
layers.
4. Important: Use fine sandpaper to remove
paint from the bottom edges of the grille.
This ensures electrical continuity for proper
shielding.
Specifications
All measurements taken with microphone mounted on
a wooden surface (76 x 76 cm)
Cartridge Type
Electret Condenser
Frequency Response
50–17000 Hz
Polar Pattern
MX392/C, MX392BE/C,
MX393/C
Cardioid
MX392/S, MX392BE/S,
MX393/S
Supercardioid
MX392/O, MX392BE/O,
MX393/O
Omnidirectional
Output Impedance
180Ω
Output Configuration
Active Balanced
Sensitivity
@ 1 kHz, open circuit voltage
Cardioid –30 dBV/Pa
Supercardioid –28 dBV/Pa
Omnidirectional –22 dBV/Pa
1 Pa=94 dB SPL
Maximum SPL
1kHzat1%THD,1kΩload
Cardioid 119 dB
Supercardioid 118 dB
Omnidirectional 111 dB
Equivalent Output Noise
A-weighted
Cardioid 23 dB SPL
Supercardioid 21 dB SPL
Omnidirectional 15 dB SPL
Signal-to-Noise Ratio
Ref. 94 dB SPL at 1 kHz
Cardioid 71 dB
Supercardioid 73 dB
Omnidirectional 80 dB
Dynamic Range
1kΩload,@1kHz
96 dB
Common Mode Rejection
10 Hz to 100 kHz
45 dB, minimum
Preamplifier Output Clipping Level
at 1% THD
–6 dBV (0.5 V)
Polarity
Positive sound pressure on diaphragm produc-
es positive voltage on pin 2 relative to pin 3 of
output XLR connector
Mute Switch
50–20000 Hz
–50 dBminimum
Logic Connections (MX392)
LED IN Activelow(≤1.0V),TTLcompatible.
Absolute maximum voltage: -0.7V
to 50V.
LOGIC-OUT Activelow(≤0.5V),sinksupto
20mA, TTL compatible. Absolute
maximum voltage: -0.7V to 24V (up
to50Vthrough3kΩ).
Cable
MX392 3½ m (12 ft) attached cable with
shielded audio pair and three
conductors for logic control,
unterminated
MX392BE 3½ m (12 ft) attached cable with
shielded audio pair and three con-
ductors for logic control, unterminat-
ed, bottom exit
MX393 3½ m (12 ft) detachable cable with
3-pin audio connector
Net Weight
172 g (0.38 lbs)
Environmental Conditions
Operating Temperature –18–57°C (0–135°F)
Storage Temperature –29–74°C (–20–165°F)
Relative Humidity 0–95%
Power Requirements
11–52 V DC, 2.0 mA

7
Furnished Accessories
Paint Mask 80C514
Switch Paint Mask 80A541
Set of 5 rubber pads with adhesive (MX392BE) RPM470
Certifications
Meets essential requirements of all applicable European Directives.
Eligible for CE marking.
The CE Declaration of Conformity can be obtained from Shure Incorporated or any of its European representatives. For contact information please visit
www.shure.com
The CE Declaration of Conformity can be obtained from: www.shure.com/europe/compliance
Authorized European representative:
Shure Europe GmbH
Headquarters Europe, Middle East & Africa
Department: EMEA Approval
Jakob-Dieffenbacher-Str. 12
75031 Eppingen, Germany
Phone: [phone]
Fax: [phone]
Email: [email protected]
Accessories
Replacement Parts
Black or White Omnidirectional Cartridge for all MX-
(Microflex®) Models and WL183
R183B
Black or White Cardioid Cartridge for WL185 and all MX-
(Microflex®) Models
R185B
12' Cable, 3-Pin Mini Connector (TA3F) to Male XLR,
Used with MX393
C129
Custom Logic Cable (specify length) 95B2509
12' Cable (5-Conductor, 2 Shielded) with threaded adapter
on microphone end to bare end for MX392
C130

38
(4.264 in.)
(3 in.) (0.89 in.)
(3.344 in.)
(3.603 in.)
(2.5 in.)
(3.544 in.)
63.5 mm
76.2 mm
84.93 mm
90 mm
91.51 mm
108.3 mm
24.17 mm