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MODEL MX400 SERIES MICROPHONES
Model MX400 Series Microphones
Specification Sheet
OVERVIEW
Shure Microflexr MX400 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.
FEATURES
S Wide dynamic range and frequency response for
accurate sound reproduction across the audio spectrum
S Interchangeable cartridges provide the right polar pattern
for every application
S Balanced, transformerless output for increased immunity
to noise over long cable runs
S Shock mount that provides over 20 dB isolation from
surface vibration noise
S Locking flange mount for permanently securing
microphone to lecterns, pulpits, or conference tables
S Snap-fit foam windscreen
MODEL VARIATIONS
S MX412: 305 mm (12 in.) gooseneck microphone.
S MX418: 457 mm (18 in.) gooseneck microphone.
S MX412S: 305 mm (12 in) gooseneck microphone;
includes a mute switch and an LED.
SPECIFICATIONS
Frequency Response (Figure 1)
50 to 17,000 Hz
Polar Pattern (Figure 2)
Output Impedance (at 1000 Hz)
Rated at 150 Ω (180 Ω actual)
Open Circuit Sensitivity (at 1 kHz, ref. 1 V/Pascal*)
Cardioid: –35.0 dB (17.8 mV)
Supercardioid: –33.5 dB (21.1 mV)
Omnidirectional: –27.5 dB (42.2 mV)
All settings –12 dB at 0 gain
*1 Pascal = 94 dB SPL
Maximum SPL (1 kHz at 1% THD, 1 kΩ load)
Cardioid: 124.2 dB
Supercardioid: 122.7 dB
Omnidirectional:116.7 dB
All settings +6 dB at 0 gain
Equivalent Output Noise (A-weighted)
Cardioid: 28.0 dB SPL
Supercardioid: 26.5 dB SPL
Omnidirectional:20.5 dB SPL
Signal to Noise Ratio (referenced at 94 dB SPL)
Cardioid: 66.0 dB
Supercardioid: 67.5 dB
Omnidirectional: 73.5 dB
E2002, Shure Incorporated
S MX418S: 457 mm (18 in) gooseneck microphone;
includes a mute switch and an LED.
Dynamic Range at 1 kΩ Load
96.2 dB
100 dB at 0 gain
Common Mode Rejection
45.0 dB minimum
Mute Switch Attenuation (switched models only)
50.0 dB minimum
Preamplifier Output Clipping Level (1% THD)
–6.0 dBV (0.5 V)
–12 dB at 0 gain
Polarity
Positive sound pressure on diaphragm produces positive
voltage on pin 2 relative to pin 3 of output connector.
Power Requirements
11 to 52 Vdc phantom, 2.0 mA
Environmental Requirements
Operating Temperature Range: –18° C to 57° C (0° F to
135° F)
Relative Humidity: 0 to 95%
Dimensions (Figure 3)
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MODEL MX400 SERIES MICROPHONES
Specification Sheet
Certification
Eligible to bear CE Marking. Conforms to European EMC Directive 89/336/EEC. Meets applicable tests and performance criteria in European Standard EN55103 (1996) parts 1 and 2, for residential (E1) and light industrial (E2) environments.
REPLACEMENT PARTS
Foam Ball Windscreen A99WS
Locking Metal Windscreen A412MWS
+10
0
–10
50 100 20020
500 1,000 2,000 5,000 10,000
Hz
CARDIOID
Portable Desktop Base A412B
Stand Adapter A57E
Omnidirectional Cartridge R183B
Supercardioid Cartridge R184B
Cardioid Cartridge R185B
Snap-fit Foam Windscreen (4) RK412WS
Shock Mount A400SM
o
20,000
180
o
150
o
120
o
90
o
60
–20 dB
–15 dB
–10 dB
–5 dB
o
30
0
250 Hz
500 Hz
1000 Hz
o
150
o
120
o
90
90
o
60
o
30
CARDIOID
120
o
o
150
o
o
60
–15 dB
o
30
180
–20 dB
–10 dB
–5 dB
0
o
2500 Hz
6400 Hz
10000 Hz
o
150
o
120
o
90
o
60
o
30
+10
–10
+10
–10
o
180
o
150
o
120
0
50 100 20020
500 1,000 2,000 5,000 10,000
20,000
o
90
–20 dB
o
60
–15 dB
–10 dB
–5 dB
o
30
0
Hz
SUPERCARDIOID
o
180
o
150
o
120
0
500 1,000 2,000 5,000 10,00050 100 20020
20,000
o
90
–20 dB
o
60
–15 dB
–10 dB
–5 dB
o
30
0
Hz
OMNIDIRECTIONAL
250 Hz
500 Hz
1000 Hz
30
250 Hz
500 Hz
1000 Hz
o
150
o
120
o
90
o
60
o
30
SUPERCARDIOID
o
150
o
120
o
90
o
60
o
150
o
120
o
90
o
60
o
30
o
150
o
120
o
90
o
60
o
30
o
180
o
–20 dB
–15 dB
–10 dB
–5 dB
0
o
180
–20 dB
–15 dB
–10 dB
–5 dB
0
2500 Hz
6400 Hz
10000 Hz
2500 Hz
6400 Hz
10000 Hz
150
30
o
150
o
120
o
90
o
60
o
30
o
o
120
o
90
o
60
o
TYPICAL FREQUENCY RESPONSE
Figure 1
OMNIDIRECTIONAL
TYPICAL POLAR PATTERNS
Figure 2
2
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MODEL MX400 SERIES MICROPHONES
428.74 mm
MX412
MX418
468.11 mm
(18.43 in.)
MX412S
(16.88 in.)
571.44 mm
(22.50 in.)
11.68 mm
(0.46 in.)
11.68 mm
(0.46 in.)
11.68 mm
(0.46 in.)
330.70 mm
(13.02 in.)
473.40 mm
(18.64 in.)
333.87 mm
(13.14 in)
98.04 mm
(3.86 in.)
98.04 mm
(3.86 in.)
134.24 mm
(5.28 in.)
Specification Sheet
20.07 mm
(0.79 in.)
20.07 mm
(0.79 in.)
20.07 mm
(0.79 in.)
11.68 mm
(0.46 in.)
66.70 mm
(2.62 in.)
473.40 mm
(18.64 in)
607.64 mm
(23.92 in.)
MX418S
14.40 mm
(0.56 in.)
38 mm
(1.5 in.)
134.24 mm
(5.28 in.)
50.80 mm
(2.00 in.)
14.40 mm
(0.56 in.)
SHOCK MOUNT ASSEMBLY
43.18 mm
(1.70 in.)
20.07 mm
(0.79 in.)
(Actual Size)
DIMENSIONS
Figure 3
MOUNTING FLANGE
3
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