Shure 574SA User Guide

2 2 2 H A R T R E Y A V E E V A N S T O N , I L L . ( 6 0 2 0 4 ) U . S . A .
MICROPHONES AND ELECTRONIC COMPONENTS
A R E A CODE 3 1 2 / 3 2 8 - 9 0 0 0	C A B L E S H U R E M I C R O

MODELS 574SA, 574SB, AND 574SF

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OMNIDIRECTIONAL DYNAMIC MICROPHONES

Model 574 Series are pressure dynamic microphones. The wide range smooth frequency response a n d o m n i d i r e c t i o n a l pickup characteristics make these microphones excellent for music and voice reproduction. T h e microphones are ruggedly built to withstand rough usage and are unaffected by temperature and humidity variations.

The versatile design of the 574 Series Microphones, coupled with their small size and light weight, permit then1 to be used in many different ways - mounted on a wall or panel, on desk or floor stand, with a lavalier or held in the hand.

MODEL 574SA M O U N T E D	MODEL 574SA USED AS
ON STAND ADAPTER	A LAVALIER M I C R O P H O N E

A stand adapter and lavalier cord-bracket are provided with the microphone. By removing the cord, the lavalier bracket can be screwed onto a wall. The adapter has a 5/8 inch-27 thread which fits conventional desk stands or Roor stands. The microphone may be easily removed from both the stand adapter or bracket for use as a hand-held microphone.

Model 574 series have a built-in switch to control the microphone circuit. The switch is a slide-to-talk locking type unit.

Applications: Model 574 Series Microphones are designed for voice and music reproduction and are ideal for recording sound on film, tape or disc; fixed or mobile public address systems ; call systems; and similar uses. When used vertically (microphone pointing straight up), the performers may be placed all around the microphone without changing frequency response.

Because of its high output, the high impedance Model 574SA may be used with practically all public address amplifiers in the installations where only a moderate length ( u p to 50 feet) (15.2m) of cable is required. Two low impedance models, 574SB and 574SF are designed for use in installations where long cable lengths are required. The Model 574SB unit is also ideally suited for use with transistor amplifiers where a medium or low impedance microphone is required.

Model 574SA is a high impedance microphone. I t may be used with any crystal or ceramic microphone amplifier or other amplifier with an input impedance of 100,000 ohms or more. If additional lengths of cable are desired with the use of Model 574SA Microphone, a high quality single conductor shielded cable is required to extend the microphone circuit. See Figure A below for internal connections.

		AMPHENOL MCLF
		TYPE	PLUG	AMPHENOL MCLM
			1	rTYPE PLUG
		SWITCH SHOWN	1
		IN .OFF"POSITION
	CARTRIDOE			CABLE - PLUG
				ASSEMBLY
POSITIVE PRESSUR
ON	DIAPHRAGM
SHALL CAUSE A
POSITIVE		VOLTAGE
ON	PIN	I OF PLUG

ELEMENT

MODEL 574SA (HIGH IMPEDANCE)

INTERNAL CONNECTIONS

FIGURE A

Model 574SB is a low impedance microphone (150-250 ohms). This unit is recommended for use where long cable lengths are required or under conditions of severe hum disturbance. Model 574SB may be fed into standard low impedance amplifier, or into an amplifier with high impedance input. I n the latter case, Shure Model A95A Line Matching Transformer is available for coupling the low impedance line to the input of high impedance amplifiers.

Model 574SF is a low-impedance microphone designed to be connected to a 25 ohm line.

If additional lengths of cable are desired with the use of Model 574SB or 574SF Microphones, a high quality two conductor shielded cable is required to extend the microphone circuit. See Figure B below for internal connections.

	AMPHENOL MC2F
	TYPE PLUG1
POSITIVE PRESSURE	BLACK		AMPHENOL	MC2M
ON DIAPHRAGM			TYPE PLUG
SHACLCAUSE A	SWITCH SHOWN
POSITIVE VOLTAGE			---
	IN "OFF" POSITION GROUND			SHIELD
ON-PIN 2 OF		($*
PLUG&NT,			L--

CABLE - PLUG

ASSEMBLY

MODEL 57458 AND 574SF (LOW IMPEDANCE)

INTERNAL CONNECTIONS

FIGURE B