Manual

GENERAL
Shure Microflex
r
MX400 Series microphones are miniature goose-
neck-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 avail-
able 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 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.
S MX418S: 457 mm (18 in) gooseneck microphone;
includes a mute switch and an LED.
SELECTING A POLAR PATTERN
All Microflex
R
microphones are available with any one of three inter-
changeable cartridges. The polar pattern of the cartridge is indicated
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 narrow or more distant coverage. Pickup
angle (–3 dB) = 115°.
Omnidirectional (O). Recommended for recording or remote
monitoring applications. Pickup angle = 360°.
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 tip of the microphone within 15 to 30 cm (6 to
12 in.) of the desired sound source.
3. Always use the supplied windscreen or the optional met-
al windscreen to control breath noise.
4. If four or more microphones will be open at the same time,
use of an automatic mixer, such as the Shure SCM810
or FP410, is recommended.
MICROPHONE INSTALLATION
Installing a Microphone in a Mounting Flange (Figure 2)
1. Drill a 22 mm (7/8 in.) diameter hole in the desired location.
2. Trace and drill three starter holes for the supplied screws
using the flange as a template.
3. Insert the preamplifier through the mounting flange.
4. Slip the mounting flange retaining ring over the bottom
of the preamplifier and slide it up until it is flush to the bot-
tom of the flange. Then press the ring firmly into place.
5. Secure the flange to the mounting surface with three
screws.
Installing a Microphone in a Shock Mount (Figure 1)
1. Drill a 44 mm (1-3/4 in.) diameter hole in the desired
location.
2. Trace and drill three starter holes for the screws using
the shock mount as a template.
3. Secure the shock mount to the mounting surface with
three screws.
Installing the Foam Windscreen (Figure 3)
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 gap in its mounting
ring with a screwdriver or thumbnail and pull the wind-
screen off carefully.
ADJUSTING PREAMP GAIN (Figure 4)
This MX microphone includes an adjustable gain preamplifier, al-
lowing the user to specify a 12 dB or 0 dB gain setting. The preamp
ships at the 12dB setting. Gain may be decreased by 12dB by moving
the preamp jumpers to the 0dB setting.
SPECIFICATIONS
Frequency Response (Figure 5)
50 to 17,000 Hz
Polar Pattern (Figure 5)
Output Impedance (at 1000 Hz)
180 Ω actual (rated at 150 Ω)
Microflex

MX400S Series
User Guide
27F2830 (BG)
2002, Shure Incorporated
Printed in U.S.A.