Shure PE57 User Guide

HOW TO CONTROL FEEDBACK

A

performer's number one enemy in using a microphone is

"feedback." This is a harsh hum, howl or squeal which oc­curs when the microphone picks up sound from the
loudspeakers, re-amplifies and rebroadcasts it over and
over again.

The key factor in the prevention of feedback is the posi­tion of the loudspeakers in relation to the microphone.
Feedback occurs if the microphone picks up sound coming
from the loudspeakers. Keep the loudspeakers as far to the
sides as possible-so they do not point toward the micro­phone. Always keep the microphone pointed toward the
performer and away from the loudspeakers.

If you are in a room with hard walls, floor, and ceiling,
the sound from the loudspeakers may bounce back into the
microphone and create feedback. Solve this problem by
turning down the amplifier volume control and working
closer to the microphone.

(Important Note: If you cannot solve the feedback prob-

lem with your Versadyne microphone, a Shure Feedback
Controller is suggested.)

BASIC POINTS FOR PROFESSIONAL
MICROPHONE TECHNIQUE

Proper microphone technique will add to the overall ef-

fectiveness with which you project yourself to your
audience. Keep the following points in mind when using
the microphone:

1.

Maintain the proper distance from the microphone.
When you wish to achieve an intimate tonal quality,
get closer to the microphone and lower your voice. For
wide-open "driving" effects, raise your voice and back
away from the microphone so that you do not over­drive your amplifier to distortion.

2.

Don't change your distance from the microphone
needlessly, as this will affect the level of sound coming
from the loudspeakers.

3.

Consider the microphone as an instrument and prac­tice your technique to enhance your performance.

YOUR SHURE MICROPHONE IS BUILT TO LAST!

Your Shure Microphone is ruggedly built and should give

you years of uninterrupted service; however, remember

that it is a sensitive instrument. Avoid dropping the micro-

phone, or subjecting it to unnecessarily rough treatment.
Normal usage, of course, will not impair performance of

the unit. Use the protective carrying case to prevent dam­age not only when traveling,

but

also when storing the

microphone.

MICROPHONE CHECK-LIST

1.

Check microphone impedance-is it correct for the
amplifier input being used?

2.

Check microphone cable connectors to mixer and
amplifier-are they tightly plugged in?

3.

Check microphone, amplifier and/or mixer.
a. Are they turned on?
b. Are volume controls turned up?

IF THE MICROPHONE DOES NOT WORK

Check the above list.

If

the microphone still does not ap­pear to be operating, have the microphone and cable
checked by your Shure Professional Entertainer Products
Dealer, or write Service Department, Shure Brothers, Inc.

PHASING

To test two microphones for proper phasing, connect them
to an amplifier and talk or sing into them while holding
them three or four inches apart. The sound from the
speakers should be the same when talking into either mi­crophone or directly between them if they are in phase
with each other. If the sound drops drastically, or if a

dead spot is found when talking between the two micro­phones, they are out of phase. All microphones should
be tested in this manner to insure that they are in phase

with each other.

To change the phase of a microphone, the microphone

2).

cartridge leads must be interchanged (see Figure
should be performed by your dealer, the Shure Factory
Service Department, or other qualified service personnel.

IMPEDANCE

Your Model
cable lengths over
if the microphone is to be connected to a low-impedance
input, it will be necessary to transform the microphone
line to low impedance. Shure Model

Matching Transformers are available for use in those cases.
These transformers provide a proper impedance match
between a high-impedance
impedance input and are supplied with various input and
output connectors.

PE57

is a high-impedance microphone. If

7.6

meters

(25

feet) are required, or

A95

lnicrophone line and a low-

Series Line

This

USING MORE THAN ONE MICROPHONE

It

is often desirable for a group to use a separate micro­phone for each individual performer. In this case, the
following points should be remembered:

1.

It is best if the microphones are individually controlled
for volume through a separate Shure microphone
mixer.

If

this is not possible, it is desirable that each
performer use the sarne type and rnodel
so that the group as a whole wjil1

2.

Check the placement of the microphones with relation

of

he

"halanced."

microphone

to loudspeakers (as previously mentioned) so that
feedback is minimized.

3.

As additional microphones are added the possibility of
feedback increases. Turn off, or down, unused micro­phones to help solve this problem.

SHURE FEEDBACK CONTROLLER

Lets you "tune" your sound system to the acoustics of the
room. The result is more overall sound power

without

feedback. Eight linear-motion filter controls are infinitely

0

to

12

variable from

8

kHz roll-off switches attenuate low and high frequencies.

dB cut. Below

63

Hz

and Above

Can be installed between mixer or console and amplifier

for total system control, or following each microphone as

a single-channel preamplifier with feedback control.

THE VITAL LINK

BETWEEN

YOU

AND

THE AUDIENCE

SHURE PROFESSIONAL ENTERTAINER

MICROPHONES

MODEL PE57 SPECIFICATIONS

Type: Dynamic, Omnidirectional

Frequency
Response:

40 to 8,000 Hz (see Figure

.*o

I

6

"

r

:~,a

i-

~-

t

+~

20

Yl

m

1)

F"EM-7

FIGURE

a-

,-

*",Z

1

Impedance: Microphone impedance is "High" tor connection to high-

Output Level
(at 1.000

Phasing: Positive pressure on diaphragm produces positive voltage

Switch:

Hz):

impedance microphone inputs.

.

. . . . . .

. .

. . . . . . . .

2

SHIELD

.-55.5

CABLE

1

.._/__-

Open Circuit Voltage

0 dB

=

1

volt per rnicrobar

on

SLEEVE of phone plug (see Figure 2 and page 4).

CARTRIDGE TRAN~FORMER

-

Built-in On-Off switch

SWITCH

(OFF

WSIIIONI

WHiTt

FIGURE

n

dB (1.66 mV)

RIW

PLUG

,-

GUARANTEE

This Shure product is guaranteed in normal use to be free from electrical and
mechan~cal defects for a per~od of one year from date of purchase. Please re­raln proof of purchase date. This guarantee includes all parts and labor. This
guarantee is in lieu of any and all other guarantees or warranties, express or
implied, and there shall be no recovery for any

damages.

consequent~al or ~ncidental

SHIPPING INSTRUCTIONS

Carefully repack the unit and return it prepaid to:

If outside the United States, return the

Service Center

Shure Brothers Incorporated
Attention: Service Department
1501 West Shure Drive
Arlington Heights, Illinois 60004

lor repair. The unit will be returned to you prepa~d.

unlt to your dealer or Authorized Shure

7

>

1

MODEL PE57 SPECIFICATIONS (Continued)

Case:

Stand Adapter:

Cable:

Net Weight:
Packaged

Weight:

Black ARMO-OUR@ wlth satln anod~zed cap and stainless
steel screen

To fit 5/8"-27 thread

6.lm (20 ft), nondetachabie, single-conductor shielded with
in. phone plug on equipment end

340 grams (12 oz)

822

grams (1 Ib, 13 oz)

FURNISHED ACCESSORIES

Stand Adapter:
Carrying Case:

A75A
90E1404

OPTIONAL ACCESSORIES

Lavalier
Assembly:

Desk Stand:
Disconnect

Adapter:

Line Matching

Transformer:
Windscreen:

A27L

5338, S37A, 5388, S39A, S40A

A45

A95 Ser~es
A61WS

REPLACEMENT PART

Cartridge:

R50

AREA CODE 3 12/866-2200

D

CABLE SHUREMICRO\

8

HH

SHURE BROTHERS

222

HARTREY AVENUE

EVANSTON, ILLINOIS

Copyright 1979
Shure Brothers
27A343 (SJ) U.S Patent D196,919

Inc.

U.S.A.

8

INC.

60204

Printed in U.S.A.