Shure MX392/S, MX300 manual General, Features, to noise over long cable runs, Model Variations

Microflex MX300 Series User Guide

Boundary Microphones

GENERAL

Shure Microflex MX300 Series microphones are surface- mounted electret condenser microphones designed primarily for mounting on conference tables, stage floors, and lecterns. Their high sensitivity and wide frequency range make them especially suitable for picking up speech and vocals in sound reinforcement and recording applications. Interchangeable cartridges provide the installer with greater flexibility and make it possible to easily reconfigure microphone coverage as the need arises. The MX392 and MX393 models include an inter- nal preamplifier.

MX300 Series microphones take advantage of the princi- ple that, at a barrier or boundary, the sound pressure level doubles. When placed near a sufficiently large boundary surface, the microphone has 6 dB higher sensitivity and ap- proximately 3 dB greater direct-to-reverberant sound ratio.

FEATURES

•Flat frequency response across the vocal range for uncolored sound

•Interchangeable cardioid, supercardioid, and omnidi- rectional cartridges that provide choices for applications

wSleek, low-profile design for unobtrusive appearance

• Balanced transformerless output for increased immunity

to noise over long cable runs

• Low susceptibility to electromagnetic hum and RFI

• Programmable on/off switch and LED on/off indicator

wLogic input/output terminals for remote control or use with automatic mixers (MX392 models only)

MODEL VARIATIONS

•MX392 Models: Surface-mount microphone; in- cludes a programmable membrane on/off switch, log- ic input/output terminals, an on/off indicator LED, screw terminal connections, and attached unterminated cable.

•MX393 Models: Surface-mount microphone; in- cludes a programmable membrane on/off switch, an on/off indicator LED, and a miniature, three pin con- nector.

Selecting a Cartridge

All Microflex microphones are available with any one of three interchangeable cartridges. The polar pattern of the original cartridge used in a particular microphone is indicated by the model number suffix:

C = Cardioid, S = Supercardioid, O= Omnidirectional

Cardioid (C). Recommended for general sound rein- forcement applications. Pickup angle (–3 dB) = 130°.

Supercardioid (S). Recommended for sound reinforce- ment applications requiring narrow or more distant cover- age. Pickup angle (–3 dB) = 115°.

Omnidirectional (O). Recommended for recording or remote monitoring applications. Pickup angle (–3 dB) = 360°.

MICROPHONE PLACEMENT

To maintain the flattest possible low-frequency re- sponse and optimum rejection of background noise, place the microphone on a flat surface that is as large as pos- sible. The surface can be a floor, table, or lectern.

NOTE: Avoid locating microphones near reflective sur- faces other than the boundary surface (i.e., beveled sides of pulpits or overhanging shelves). Failure to do so will re- sult in increased levels of reverberant sound.

MICROPHONE APPLICATION AND SELECTION GUIDE

Application	Mounting Surface	Microphone to	Cable Output	Polar Pattern	Microflex Model
		Cable Connector	Connector
Sound reinforcement for	Lectern, pulpit, stage floor, or	Hard Wired	Hard Wired	Cardioid	MX392/C
speech and vocals	conference table	Hard Wired	Hard Wired	Supercardioid	MX392/S
		TA3F	XLR	Cardioid	MX393/C
		TA3F	XLR	Supercardioid	MX393/S
Recording or remote moni-	Lectern, pulpit, stage floor, or	Hard Wired	Hard Wired	Omnidirectional	MX392/O
toring of speech and vocals	conference table	TA3F	XLR	Omnidirectional	MX393/O
Video conferencing or	Lecturn, pulpit, stage floor, or	Hardwired	TA3F	Cardioid	MX392/CZ
computer telephony	conference table

2002, Shure Incorporated

27E2834 (BE)

Printed in U.S.A.