Shure Versadyne PE57 Manuel utilisateur

HOW TO CONTROL FEEDBACK

performer's number one enemy in using a microphone is

"feedback." This is a harsh hum, howl or squeal which oc-

curs 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 posi-

tion 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 micro-

phone. 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:

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 over-

drive your amplifier to distortion.

Don't change your distance from the microphone

needlessly, as this will affect the level of sound coming

from the loudspeakers.

Consider the microphone as an instrument and prac-

tice 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 dam-

age not only when traveling,

but

also when storing the

microphone.

MICROPHONE CHECK-LIST

Check microphone impedance-is it correct for the

amplifier input being used?

Check microphone cable connectors to mixer and

amplifier-are they tightly plugged in?

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.

the microphone still does not ap-

pear 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 mi-

crophone 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 micro-

phones, 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

cartridge leads must be interchanged (see Figure

2).

This

should be performed by your dealer, the Shure Factory

Service Department, or other qualified service personnel.

IMPEDANCE

Your Model

PE57

is a high-impedance microphone. If

cable lengths over

7.6

meters

(25

feet) are required, or

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

A95

Series Line

Matching Transformers are available for use in those cases.

These transformers provide a proper impedance match

between a high-impedance lnicrophone line and a low-

impedance input and are supplied with various input and

output connectors.

USING MORE THAN ONE MICROPHONE

is often desirable for a group to use a separate micro-

phone for each individual performer. In this case, the

following points should be remembered:

It is best if the microphones are individually controlled

for volume through a separate Shure microphone

mixer.

this is not possible, it is desirable that each

performer use the sarne type and rnodel

microphone

so that the group as a whole wjil1

"halanced."

Check the placement of the microphones with relation

to loudspeakers (as previously mentioned) so that

feedback is minimized.

As additional microphones are added the possibility of

feedback increases. Turn off, or down, unused micro-

phones 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

variable from

dB cut. Below

and Above

kHz roll-off switches attenuate low and high frequencies.

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

:~,a

F"EM-7

*",Z

FIGURE

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

impedance microphone inputs.

Output Level

(at 1.000

Hz):

Open Circuit Voltage

... . . .

. .

. .. . . .. .

.-55.5

dB (1.66 mV)

0 dB

volt per rnicrobar

Phasing: Positive pressure on diaphragm produces positive voltage

on SLEEVE of phone plug (see Figure

and page 4).

CARTRIDGE TRAN~FORMER

SWITCH

(OFF

WSIIIONI

CABLE

RIW

PLUG

WHiTt

SHIELD

.._/__-

FIGURE

Switch: Built-in On-Off switch

GUARANTEE

This Shure product is guaranteed in normal use to be free from electrical and

mechan~caldefects for a per~odof one year from date of purchase. Please re-

raln 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 consequent~al or ~ncidental

damages.

SHIPPING INSTRUCTIONS

Carefully repack the unit and return it prepaid to:

Shure Brothers Incorporated

Attention: Service Department

1501 West Shure Drive

Arlington Heights, Illinois 60004

If outside the United States, return the unlt to your dealer or Authorized Shure

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

MODEL PE57 SPECIFICATIONS (Continued)

Case:

Black ARMO-OUR@ wlth satln anod~zedcap and stainless

steel screen

Stand Adapter:

To fit 5/8"-27 thread

Cable:

6.lm (20 ft), nondetachabie, single-conductor shielded with

in. phone plug on equipment end

Net Weight:

340 grams (12 oz)

Packaged

Weight:

822

grams (1 Ib, 13 oz)

FURNISHED ACCESSORIES

Stand Adapter:

A75A

Carrying Case:

90E1404

OPTIONAL ACCESSORIES

Lavalier

Assembly:

A27L

Desk Stand:

5338, S37A, 5388, S39A, S40A

Disconnect

Adapter:

A45

Line Matching

Transformer:

A95 Ser~es

Windscreen:

A61WS

REPLACEMENT PART

Cartridge:

R50

AREA CODE

12/866-2200 CABLE SHUREMICRO\

SHURE BROTHERS

INC.

222

HARTREY AVENUE

EVANSTON, ILLINOIS

60204

U.S.A.

Shure Brothers Inc. Printed in U.S.A.

27A343 (SJ) U.S Patent D196,919

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