Shure Microflex MX424/N Technical manual

MX400 Series
Gooseneck Microphones
Online user guide for Shure Microflex MX400 Series miniature gooseneck-mounted electret condenser microphones.
Version: 5 (2019-J)

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Table of Contents
MX400 SeriesGooseneck Microphones 3
General Description 3
Interchangeable Cartridges 3
Snap-Fit Windscreen 4
Preamp Gain 5
Microphone Placement 5
Permanent Installation 5
Flange 6
Shock Mount 6
Specifications 7
Certifications 10

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MX400 Series
Gooseneck Microphones
General Description
Shure Microflex MX400S Series microphones are miniature gooseneck-mounted electret condenser microphones designed
primarily for speech and vocal pickup. They can be mounted on lecterns, pulpits, or conference tables. All models include a
preamplifier and are available with interchangeable cardioid, supercardioid, or omnidirectional cartridges.
Wide dynamic range and frequency response for accurate sound reproduction
Interchangeable cartridges that provide an optimal polar pattern choice for each application
Shock mount provides over 20 dB of isolation from surface vibration noise
Snap-fit foam windscreen
RF filtering
MX400 microphones are available with 305 mm (12 in.) or 457 mm (18 in.) goosenecks, with or without a mute switch. They
are available in supercardioid, cardioid and omnidirectional polar patterns.
"S" models include a mute button and LED.
"D" models include a desktop base with programmable mute button and LED and logic input and output.
"SE" models feature a surface mount flange with side-exit cable.
The polar pattern of the included cartridge is indicated by a model number suffix:
/C Cardioid
/S Supercardioid
/O Omnidirectional
/N Cartridge not included
Interchangeable Cartridges
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Microflex microphones use interchangeable cartridges that allow you to choose the polar pattern for different installations.
Snap-Fit Windscreen
Snap into the groove below the cartridge.
To remove, spread the gap with a screwdriver or thumbnail.

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Provides 30 dB of "pop" protection.
Preamp Gain
If necessary, the preamplifier gain can be reduced by 12 dB. Contact an authorized Shure service center for information.
Microphone Placement
Aim the microphone toward the desired source, such as the talker.
Aim it away from any unwanted source, such as a loudspeaker.
Place the microphone within 15 to 30cm (6 to 12 in.) of the desired sound source.
Always use the supplied windscreen or optional metal windscreen to control breath noise.
If four or more microphones will be open at the same time, use of an automatic mixer, such as the Shure SCM810 or
SCM410, is recommended.
Permanent Installation
Mount the microphone using one of the following methods.

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Flange
Drill a 22 mm (7/8 in.) diameter hole in the desired location.
Trace and drill three starter holes for the supplied screws using the flange as a template.
Insert the preamplifier through the mounting flange.
Slip the mounting flange retaining ring over the bottom of the preamplifier and slide it up until it is flush to the bottom of
the flange. Then press the ring firmly into place.
Secure the flange to the mounting surface with three screws.
Shock Mount
Drill a 44mm(1-3/4 in.) diameter hole in desired mounting surface.
Mark and drill starter holes for screws, using shock mount as a template.
Secure shock mount to mounting surface with screws.
Thread the supplied adapter onto the MX400 microphone before inserting it into the shock mount.

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Specifications
Type
Electret Condenser
Frequency Response
50–17000Hz
Polar Pattern
MX412/C, MX418/C Cardioid
MX412/S, MX418/S Supercardioid

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Output Impedance
180Ω
Output Configuration
Active Balanced
Sensitivity
@ 1 kHz, open circuit voltage
Cardioid –35dBV/Pa(18 mV)
Supercardioid –34dBV/Pa(21 mV)
1 Pa=94 dB SPL
Maximum SPL
1 kHz at 1% THD, 1 kΩ load
Cardioid 124dB
Supercardioid 123dB
Self Noise
A-weighted
Cardioid 28dBSPL
Supercardioid 27dBSPL
Signal-to-Noise Ratio
Ref. 94 dB SPL at 1 kHz
Cardioid 66dB
Supercardioid 68dB
Dynamic Range
1 kΩ load, @ 1 kHz
96dB
Common Mode Rejection
10 Hz to 100 kHz
45dB, minimum
Clipping Level
at 1% THD
–6dBV (0.5V)
Polarity
Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output XLR
connector
Mute Switch
MX412S/MX418S
–50dB minimum

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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

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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