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 direct-to-reverberant sound ratio.
The MX392, MX392BE, and MX393 feature programmable logic input and output. Additionally they provide following benefits:
The polar pattern of the included cartridge is indicated by a model number suffix:
/N Cartridge not included
Microflex microphones use interchangeable cartridges that allow you to choose the polar pattern for different installations.
Note: If using rear side-exit cable option, only drill two outer holes.
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 surfaces above or to the side of the microphone, such as beveled sides of pulpits or overhanging shelves.
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:
Note: The pressure sensitive adhesive will be extremely difficult to move once pressure has been applied.
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.
|OFF (factory default)||ON|
|3||Mute button enabled, LED illuminates when mic is active||Disable mute button (microphone always on), logic controls LED|
NOTE: Audio and logic ground are connected at microphone base.
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).|
|Toggle: (Push On/Push Off): Mic is active when powered on|
|Toggle: (Push On/Push Off): Mic is mute when powered on|
Use these settings if connecting the microphone to an automatic mixer or other device that mutes audio and controls the LED.
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.
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):
A supplied plastic paint shield
D foam screen
E supplied adhesive masking strip
F supplied rubber plug
All measurements taken with microphone mounted on a wooden surface (76 x 76 cm)
|MX392/C, MX392BE/C, MX393/C||Cardioid|
|MX392/S, MX392BE/S, MX393/S||Supercardioid|
|MX392/O, MX392BE/O, MX393/O||Omnidirectional|
@ 1 kHz, open circuit voltage
1 Pa=94 dB SPL
1 kHz at 1% THD, 1 kΩ load
|Cardioid||23 dB SPL|
|Supercardioid||21 dB SPL|
|Omnidirectional||15 dB SPL|
Ref. 94 dB SPL at 1 kHz
1 kΩ load, @ 1 kHz
10 Hz to 100 kHz
45 dB, minimum
at 1% THD
–6 dBV (0.5 V)
Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output XLR connector
–50 dB minimum
|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).|
|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 conductors for logic control, unterminated, bottom exit|
|MX393||3½ m (12 ft) detachable cable with 3-pin audio connector|
172 g (0.38 lbs)
|Operating Temperature||-18-57 °C(0-135 °F)|
|Storage Temperature||-29-74 °C(-20-165 °F)|
11-52V DC , 2.0 mA
|Switch Paint Mask||80A541|
|Set of 5 rubber pads with adhesive||RPM470|
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
75031 Eppingen, Germany
Phone: +49-7262-92 49 0
Fax: +49-7262-92 49 11 4