Shure MX412, MX412S, MX418, MX418S Specification Sheet
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)
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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