Shure | 574SA | User guide | Shure 574SA User guide

Shure 574SA User guide
2 2 2 HARTREY AVE
EVANSTON, ILL. ( 6 0 2 0 4 ) U.S.A.
MICROPHONES AND ELECTRONIC COMPONENTS
AREA CODE 3 1 2 / 3 2 8 - 9 0 0 0
CABLE SHUREMICRO
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
ON STAND ADAPTER
MODEL 574SA USED AS
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
r
1
SWITCH SHOWN
IN .OFF"POSITION
1
AMPHENOL MCLM
TYPE PLUG
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
ON DIAPHRAGM
SHACLCAUSE A
POSITIVE VOLTAGE
ON-PIN 2 OF
PLUG&
N
T,
AMPHENOL MC2M
TYPE PLUG
BLACK
SWITCH SHOWN
IN "OFF" POSITION
GROUND
($*
- --
SHIELD
L--
CABLE - PLUG
ASSEMBLY
MODEL 57458 AND 574SF (LOW IMPEDANCE)
INTERNAL CONNECTIONS
FIGURE B
Operation: No special precautions beyond ordinary care are necessary in operation
of the 574 Series Microphones. They will operate very satisfactorily under all ordinary
conditions of humidity, heat, and cold. Dropping the microphones or other severe
mechanical shocks should be avoided.
FREQUENCY IN CYCLES PER S E C O N D
FREQUENCY RESPONSE
FIGURE C
L
461 A L & ( ~ . ~ m r n )
64
(125.8 mm)
OVERALL DIMENSIONS
FIGURE D
Guarantee: Each microphone is guaranteed to be free from electrical and mechanical defects for a period of one year from date of shipment from factory, provided all
instructions are complied with fully. I n case of damage, return the microphone to
the factory for repairs.
SPECIFICATIONS
Frequency Response: 40 to 15,000 Hz (cps) (See Figure C ) .
1,000 Hz (cps) Response
Model 574SA
open circuit voltage .............................................................- 56.0 db* ( 1.58 mv)
EIA M i c r o ~ h o n eRating GM................................................ - 5 . db***
(Sensitivity)
Model 574SB
open circuit voltage .............................................................- 79.0* (0.11 mv)
power level into 200 ohms .................................................... - 57.5 db**
EIA Microphone Rating GM.............................................-15.5
db***
-
Model 574SF
open circuit voltage ..............................................................- 88.01(0.059 mv)
power level into 25 ohms.................................................. - 57.5 db**
EIA Microphone Rating GM................................................-153.5 db***
(Sensitivity)
*Odb = 1 volt per microbar
**Odb = 1 milliwatt with 10 microbars
***EIA Standard SE-105 August 1949
Microbar = 1 dyne per square centimeter
Recommended Load Impedance: Model 574SA-100,000
574SB-150-250 ohms. Model 574SF-25 ohms.
ohms or more. Model
Cable:
Highly durable detachable cable with exceptionally effective hum shielding.
Model 574SA. 7 foot (2.1 m ) , one-conductor shielded plastic jacketed with
Amphenol MC2F type plug attached on microphone end. Shure Part No.
94A421 Cable and Plug Assembly.
Model 574SB and 574SF. 7 foot (2.1 m ) , two-conductor shielded plastic
jacketed with Amphenol MC2F type plug attached on microphone end.
Shure Part No. 94B257 Cable and Plug Assembly.
Switch: Built-in "ON-OFF" switch to control microphone circuit.
Finish: Gray high impact plastic body with satin anodized cap and stainless steel
grille.
Dimensions:
(See Figure D )
Stand Adapter T h r e a d : s/s inch-27
thread.
Weight: Net weight 5 ounces (141.8 g ) . Packaged weight 1 pound 1 ounce (481.9 g ) .
FURNISHED ACCESSORIES
Mode1 65A280A
Model A27L
Stand Adapter
Lavalier Assembly (and Wall Bracket)
Model S38B
Model A95A
Desk Stand
Line Matching Transformer
Model
Model
Model
Model
Model
Dynamic Cartridge
Switch (574SA)
Switch (574SB, 574SF)
Cable and Plug Assembly (574SA)
Cable and Plug Assembly (574SB, 574SF)
OPTIONAL ACCESSORIES
REPLACEMENT COMPONENTS
R50
94B344
94C344
94A421
94B257
Copyriqht 1967, Shure Brothers, Inc.
27A437 (1-67)
U. 5. Patent D196.919
Printed in U.S.A.
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