Shure Microflex MX400D Series User Manual

GENERAL
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Shure Microflex MX400D Series microphones are miniature
electret condenser gooseneck microphones with a desktop base
and attached 3 m (approximate)/10 ft cable. The desktop base al-
lows these microphones to be used in multi-purpose rooms where
quick set-up is required, or where permanent installation is impracti-
cal.
FEATURES
Wide dynamic range and frequency response for accurate
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sound reproduction across the audio spectrum
Interchangeable cartridges provide the right polar pattern
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for any application
Balanced, transformerless output for increased immunity to
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noise over long cable runs
w Programmable on/off switch and LED on/off indicator
New brighter LED improves visibility under strong ambient
•
lighting
Logic input and output terminals for remote control or use
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with automatic microphone mixers
Snap-fit foam windscreen
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MODEL VARIATIONS
MX412D: 304.8 mm (12 in.) desktop mini-condenser,
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gooseneck-mounted microphone.
MX418D: 457.2 mm (18 in.) desktop mini-condenser, goose-
•
neck-mounted microphone.
SELECTING A POLAR PATTERN
All Microflex microphones are available with any one of three
interchangeable cartridges. The polar pattern of the cartridge is in-
dicated by the model number suffix:
/C = Cardioid, /S = Supercardioid, /O= Omnidirectional
Cardioid (C). Recommended for general sound reinforcement
applications. Pickup angle (–3 dB) = 130°.
Supercardioid (S). Recommended for sound reinforcement
applications requiring narrower or more distant coverage. Pickup
angle (–3 dB) = 115°.
Omnidirectional (O). Recommended for recording or remote
monitoring applications. Pickup angle = 360°.
2003, Shure Incorporated
27F2831 (CE)
Microflex
Desktop Microphones User Guide
GENERAL INSTALLATION GUIDELINES
1. Aim the microphone toward the desired sound source,
such as the talker, and away from any unwanted sound
source, such as a loudspeaker.
2. Place the microphone cartridge within 15 to 30 cm (6 to 12
in.) of the desired sound source.
3. Always use the supplied windscreen or the optional metal
windscreen to control breath noise.
4. If four or more microphones will be on at the same time, use
of an automatic mixer, such as the Shure SCM810 or
FP410, is recommended to minimize feedback and noise.
MICROPHONE INSTALLATION
Securing a Microphone to a Mounting Surface (Figure 1)
1. Install two No. 6 wood screws, 50.8 mm (2 in.) apart, on the
mounting surface.
2. Place the key holes over the screw heads and push the mi-
crophone into position. Adjust the height of the screws as
necessary to secure the microphone.
Installing the Foam Windscreen (Figure 2)
1. Press the foam windscreen onto the microphone until it
snaps into the groove located below the cartridge.
2. To remove the windscreen, spread the slot in its mounting
ring with a screwdriver or thumbnail and pull the windscreen
off carefully.
INTERNAL DIP SWITCH FUNCTIONS
All MX400D models have internal DIP switches that allow the
user to program the On/Off switch for a variety of applications. To
gain access to the DIP switches, remove the bottom plate.
LOGIC TERMINAL DEFINITIONS
LOGIC GND Terminal: Connects to the logic ground of an auto-
matic mixer, switcher, or other equipment. Can be modified to pre-
vent ground loops. Refer to the Logic Modifications paragraph.
SWITCH OUT Terminal: Provides a TTL logic low (0 Vdc)
when the membrane switch is pressed. Provides TTL logic high
(5 Vdc) otherwise. This signal is available at all times for all
switch settings. The Switch Out function provides momentary
closure when S1 is Off and latching closure when it is On.
LOGIC MODIFICATIONS
Isolating Logic Ground from Audio Ground (Figure 6)
1. Remove jumper R40 from the top of the circuit board.
2. Make sure LOGIC GND terminal connects to the logic ground
of the automatic mixer, switcher, or other equipment.
Changing SWITCH OUT Terminal to Momentary,
Independent of S1 position. (Figure 6)
To accommodate interface equipment requiring momentary
closure of the microphone (even when the desired microphone
function is latching on/off), proceed as follows:
1. Remove R45 from the top of the circuit board.
2. Reinstall R45 at location R46 on the top of the circuit board.
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MX400D Series
Printed in U.S.A.