Shure Microflex M300 Series Manuale utente

MX392 MX393

Boundary Microphones

The Shure small, surface-mounted electret condenser microphone series, MX392-393, user guide.

Version: 4 (2019-J)

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Table of Contents
MX392 MX393Boundary Microphones 3
General Description 3
Features 3
Model Variations 3
Interchangeable Cartridges 3
Permanent Installation 5
MX392 and MX393 5
Microphone Placement 6
MX392BE 6
Configuration 8
DIP Switches 8
Wiring Diagram 8
Mute Button Configuration 9
Connecting to an Automatic Mixer 10
Logic Wiring 10
Changing SWITCH OUT to Always Momentary 11
Painting 11
Specifications 12
Furnished Accessories 15
Certifications 15

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•

MX392 MX393

Boundary Microphones

General Description

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 espe

cially 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.

Features

The MX392, MX392BE, and MX393 feature programmable 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

The polar pattern of the included cartridge is indicated by a model number suffix:

/C Cardioid

/S Supercardioid

/O Omnidirectional

/N Cartridge not included

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Interchangeable Cartridges

Microflex microphones use interchangeable cartridges that allow you to choose the polar pattern for different installations.

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Cartridge Polar Patterns

Permanent Installation

MX392 and MX393

Remove grille to access mounting key holes.

Cut slots into pads.

Slide microphone forward to engage screws in slots.

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Note: If using rear side-exit cable option, only drill two outer holes.

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 surfaces above or to the side of the microphone, such as beveled sides of pulpits or

overhanging shelves.

MX392BE

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 mi

crophone firmly in place.

Drilling the hole:

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.

Route the cable through the drilled hole.

Connect the cable to a mixer or P.A. system.

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Pressure Sensitive Adhesive

Thoroughly clean the application area with the included alcohol wipe. Removing the dust will allow the microphone to

adhere well.

Remove the adhesive backing and gently set the microphone into position.

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.

Bottom view of MX392BE/C with adhesive pads

Re-Routing Cable for Bottom Exit (If your MX392 is not BE configured)

Remove the grille.

Disconnect wires from screw terminals.

Grasp rubber boot within 1/2" of housing, using gas pliers. Rotate boot and cable ccw to remove connector from thread

ed "L" bracket.

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10.

11.

Remove cable from microphone housing.

Insert cable through access hole in microphone base.

Insert cable connector through hole and thread it into "L" bracket.

If desired, rubber strain relief can be reattached to cable end or removed from cable before fastening it to bracket.

Re-connect wires to proper screw terminals on circuit board.

Insert supplied round rubber plug into unused side cable exit.

Reinstall grille and foam screen.

Insert cable through hole in mounting surface. Secure microphone to mounting surface.

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.

OFF (factory default) ON

1Momentary Toggle

2Push-to-mute Push-to-talk

3Mute 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.

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Mute Button Configuration

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

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Switch Function DIP Switch Setting

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.

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.

Set DIP switch 3 on. This disbles the mute button (the microphone passes audio regardless of whether the button is

pressed or not).

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

Green (LOGIC GROUND): Connects to the logic ground of an automatic mixer, switcher, or other equipment.

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