Custom Switch Modifications
S4 is available for custom logic modifications. When S4 is in the ON position, pad W4 is connected to pad W5.
NOTE: For technical data by Fax, phone
SHURE, the Shure logo, and MICROFLEX are registered trade- marks of Shure Brothers Incorporated.
REPLACEMENT PARTS AND ACCESSORIES
DESIRED MICROPHONE FUNCTION | USER ACTION/LED DISPLAY |
| DIP SWITCH SETTINGS |
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Push to Mute (As Shipped) | Press and hold switch to temporarily mute micro- | S1 | = OFF |
| phone; release switch to unmute | S2 | = OFF |
| LED turns on when microphone is active | S3 | = OFF |
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Push to Talk | Press and hold switch to activate microphone; re- | S1 | = OFF |
| lease switch to mute | S2 | = ON |
| LED turns on when microphone is active | S3 | = OFF |
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Push On/Push Off | Press switch to toggle microphone on or off | S1 | = ON, |
| LED turns on when microphone is active | S2 | = ON for muted initial state |
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| S2 | = OFF for active initial state |
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| S3 | = OFF |
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Switch Deactivated, Mic Always Active | No action, LED Always OFF | S3 | = ON |
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Switch Deactivated, Mic Always Active | Short LED IN terminal to LOGIC GROUND terminal | S3 | = ON |
| LED Always ON |
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Automatic Mixer Mode | If S1=OFF, SWITCH OUT signal will be momentarily | S1 | = ON or OFF |
| logic low when switch is pressed | S3 | = ON |
| If S1=ON, SWITCH OUT signal will be latching logic |
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| low when switch is pressed |
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| Connect SWITCH OUT signal to various logic inputs |
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| of automatic mixer for custom functions |
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| Connect mixer channel GATE OUT to microphone |
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| LED IN. LED on microphone turns on when its |
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| channel is gated on |
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SPECIFICATIONS
Frequency Response (Figure 3)
50 to 17,000 Hz
Polar Pattern (Figure 4)
Output Impedance (at 1000 Hz)
Rated at 150 Ω (180 Ω actual)
Open Circuit Sensitivity
At 1 kHz, ref. 1 V per microbar*
Cardioid: ±53.5 dBV (2.11 mV)
Supercardioid: ±52.5 dBV (2.37 mV)
Omnidirectional: ±48.0 dBV (3.98 mV)
*1 microbar = 74 dB SPL
At 1 kHz, ref. 1 V per Pascal*
Cardioid: ±33.5 dBV (21.1 mV)
Supercardioid: ±32.5 dBV (23.7 mV)
Omnidirectional: ±28.0 dBV (39.8 mV)
*1 Pascal = 94 dB SPL
Maximum SPL (1 kHz at 1% THD, 1 kΩ load)
Cardioid: | 123.0 dB |
Supercardioid: | 122.0 dB |
Omnidirectional: 117.5 dB
Equivalent Output Noise
Cardioid: | 29.0 dB SPL |
Supercardioid: | 28.0 dB SPL |
Omnidirectional: 23.5 dB SPL
Signal to Noise Ratio (referenced at 94 dB SPL)
Cardioid: | 65.0 dB |
Supercardioid: | 66.0 dB |
Omnidirectional: 70.5 dB
Dynamic Range with 1 kΩ Load 94.0 dB
Common Mode Rejection
45.0dB minimum
Mute Switch Attenuation
50.0dB minimum
Preamplifier Output Clipping Level (1% THD) ±6.0 dBV (0.5 V)
Polarity
Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of XLR output connector.
Power Requirements
11 to 52 Vdc phantom, 2.0 mA
Environmental Requirements
Operating Temperature Range: ±18° to 57° C (0° to 135° F)
Relative Humidity: 0 to 95% Dimensions (Figure 5)
Weight
MX412D: 0.81 kg (1.80 lbs) net, 1.63 kg (3.62 lbs) packaged
MX418D: .82 kg (1.82 lbs) net, 1.64 kg (3.64 lbs) packaged
Cable Type (Figure 7)
The attached custom cable contains a shielded audio pair and three unshielded conductors for logic control. Overall diameter = 0.6 mm (0.165 in.)
Certification
Conforms to European Union directives, eligible to bear CE marking; meets European Union EMC Immunity Requirements (EN 50 082±1, 1992).
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