Shure 581SB User Guide

UNIDIRECTIONAL DYNAMIC MICROPHONES

General:

phones are moving coil dynamic units built to provide excellent reproduction of music and voice and to feature an exceptionally good unidirectional microphone pickup pattern.

These microphones are particularly suitable for use in theatres, night clubs, auditoriums, schools, churches, and any place where ordinary microphones may not operate properly because of poor acoustics. These microphones will in almost every instance eliminate the annoying "squeals and howls" caused they will prevent echoing (boominess) that sometimes occurs in partially-filled halls. These microphones can also be used closer to loudspeakers than usual, without creating feedback problems.

This

smooth sound, makes them particularly good for use with orchestras, small combos, and singers.

In addition, the microphone features:

lected because of pickup".

An easily field-replaceable microphone cartridge.

internally, which permits quieter handling.

the switch in An adjustable swivel adapter that enables you to

aim the microphone where you want

use

The Model

into high impedance microphone inputs.

The Model

ohms and required, or where there are conditions of severe hum disturbance. pedance amplifier, use a Shure Model ing Transformer.

The Model

designed for installations where lower impedances

and are required.

The Model

Unidirectional Dynamic Microphones. The units are matched within frequency response.

For convenient connection to most tape recorders,

standard phone plugs have been installed on the Model

SA-MP

tions, and performance data listed for the Model apply to the Model

The Model

suppression of feedback, combined with

strong, easily disconnected cable, especially se-

cartridge that

built-in "on-off'' switch with a device to lock

581

its

"on" position.

Series Unidyne A Micro-

feedback. In addition,

good shielding from "hum

protectively shock-mounted

it.

plastic cushioned slot in the swivel that makes

easy to quietly pull the microphone out and

comfortably in the hand.

581SA

recommended where long cable lengths are

581SF

microphone cables.

high impedance for connection

581SB

has a low impedance of

use the Model

has a low impedance of

SA-MP

1.0

in level and within

581SB

set

of two matched Unidyne

All

with a

A95A

features, specifica-

high

Line Match-

ohms

1.5

581SA-MP

Microphones.

their

150

im-

for

Models

The matched Model intended for stereo recording or similar use. Many acoustic conditions affect the final placement of microphones during a stereo recording. to experiment with various locations of the microphones to achieve placement best suited to your individual requirements. For pickup of large groups, advisable to raise the microphones above the performers to gain balance between front and rear of the group.

581SB

and

581SF

Model

Microphones are primarily

usually necessary

SPEC1 FICATIONS

Type: Frequency Response:

Polar Pattern:

Microphone

Model 58

Model

Model 581SF

QUtpU* Level:

Model

Model 58

Dynamic

12,000

Cardioid (unidirectional) Response. Uniform with frequency, symmetrical

d b***

db*

db** db***

about axis (See Figure

Rating

581SB

For connecting into microphone inputs rated at to 200 ohms

For connection into microphone inputs rated at

,to

50 ohms

581SA

Open circuit voltage

EIA

Microphone Rating

Gm (Sensitivity)

Open circuit voltage Power Level

EIA

Microphone Rating

Gm (Sensitivity)

ISB

150 ohms Impedance

...._._...__..._____.....

Impedance:

High

150 ohms

1000

High

Impedance

.__.__.____

_...___..._._._-

_..________

Impedance

ohms

(cps) Response

56.5

52.5

79.5

57.0

581SA

may be

(CPS)

.48

mv]

I05 mv)

1965,

(ME)

Shure Brothers, Inc.

U.S.

Patent 3,132,713. Other patents pending.

Printed in

U.S.A.

Model 581SF

Open circuit voltage Power Level

EIA

Microphone Rating

Gm (Sensitivity)

***

db = EIA

Switch:

Shock

Case:

Case

Built-in nished. Microphone installed. To lock switch in loosen screw on lockplate and turn lockplate

80°. Retighten screw.

Mom*:

Die-cast and "Armo-Dur".

Finish:

Dimensions:

/I~l!~rn)~~j (38.1

1'?(6

(46.0

mm)

ohms Impedance

_._________

87.5

db*

(.043

...

....__..._.___

volt per microbar

milliwaft with

Standard

SE-105,

"ON-OFF''

Internal vibration-isolation of rubber

construction.

Chrome and Gray with stainless steel grille.

See Figure

57.0

db**

-152.5

microbars

switch with lockplate fur-

db***

August

shipped wifh lockplate

"ON"

1949.

position,

mm)

(6.4

mv)

mm)

This

Guarantee:

normal use to be free from electrical and mechanical defects for a period of one year from the date of purchase. Please retain proof of purchase date. guarantee includes all parts and labor.

Skipping

and return United States, return the unit to your dealer or Authorized Shure Service Center for repair. The unit will be returned to you prepaid.

ins#ructisns:

prepaid to the factory.

Skure product

250

HERTZ

guaranteed in

This

Carefully repack the unit

outside the

Net

OVERALL

Weight:

FIGURE

OZ.

DIM

(369

ENS

gms)

IONS

FURNllSHED ACCESSORIES: Cable:

Highly

hum shielding.

Model

Model 581SF and

581SA

Detachable shielded cable with microphone connector.

Detachable 15-foot

shielded cable with microphone connector and

a standard phone plug attached.

Detachable 18-foot (5.5 meter) two-conductor shielded cable with microphone connector attached.

durable with exceptionally effective

foot

(4.6

meter) one-conductor

SA-MP

(4.6

meter) one-conductor

581SB

(10.3

'32

mm)

TYPICAL DIRECTIONAL PATTERN

FIGURE

7.000

IO.OOOHERTZ

Swivel Adapfer:

Model A25B, long life, quality swivel connector, lined with a long-life nylon sleeve for noise free and scratch-free insertion and removal of microphone.

high

TYPICAL DIRECTIONAL PATTERN

FIGURE

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