GENERAL
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
FEATURES
•Wide dynamic range and frequency response for accurate sound reproduction across the audio spectrum
•Interchangeable cartridges provide the right polar pattern for any application
•Balanced, transformerless output for increased immunity to noise over long cable runs
•Programmable on/off switch and LED on/off indicator
•Logic input and output terminals for remote control or use with automatic microphone mixers
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MODEL VARIATIONS
•MX412D: 304.8 mm (12 in.) desktop
•MX418D: 457.2 mm (18 in.) desktop
SELECTING A POLAR PATTERN
All Microflex microphones are available with any one of three interchangeable 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 narrower or more distant coverage. Pickup angle (±3 dB) = 115°.
Omnidirectional (O). Recommended for recording or remote monitoring applications. Pickup angle = 360°.
Shure Brothers Incorporated
222 Hartrey Avenue
Evanston IL
Microflex MX400D Series User Guide
Desktop Microphones
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.
E1999, Shure Brothers Incorporated | Printed in U.S.A. |
27D2831 (SF) |