PE54 User Guide
MODEL PE54
UNIDYNEB I11
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. When stage
monitor loudspeakers are used, make sure they are positioned in front of the performers and face the rear of the
microphone.
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 problem with your UNIDYNE@
111 microphone, a Shure Feedback Controller is suggested.)
BASIC POINTS FOR PROFESSIONAL
MICROPHONE TECHNIQUE
Proper microphone technique will add to the overall effectiveness 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 instrunlent. Avoid dropping the microphone, 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
n~icrophone.
MICROPHONE CHECK-LIST
I . Check microphone impedance-is
amplifier input being used?
it correct for the
1. Check nlicrophone cable connectors to nlicrophone,
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 nlicrophone then does not
appear to be operating, check it on a spare cable. 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
T o test two microphones and/or their cables 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 cables and microphones should be tested in this manner to insure that they
are in phase with each other.
T o 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 PE54 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 microphone line and a lowimpedance input, are fully reversible, and are supplied
with various input and output connectors.
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 of microphone
so that the group as a whole wjil1 he "halanced."
2. Check the placement of the microphones with relation
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
variable from 0 to 12 dB cut. Below 63 Hz and Above
8 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 PE54 SPECIFICATIONS
Type:
Dynarnlc, C a r d i o ~ d ( U n t d i r e c t ~ o n a l )
Frequency
Response:
50 t o 15.000 Hz (see F ~ g u r e1)
+LO
M
Y
)
I
O
O
lsroxz"
w
1"
M W
2
-
*llI
FIGURE 1
Impedance:
Output Level
(at 1,000 Hz):
Phasing:
Microphone Impedance i s "High"
impedance r n ~ c r o p h o n e Inputs
for connection t o high-
Open Clrcuit Voltage . . . . . . . . . . . . . . .
(0 d B = 1 volt per microbar)
. . . -54
dB
(2.0 mV)
P o s ~ t ~ vpressure
e
on d ~ a p h r a g r nproduces positive voltage o n
Pin 1 (see Figure 2 a n d Page 4).
S W I W
iai
;OII'XIII
8,.
m
F
RYrCn
iiaw
oa9-0
I*ORU(
courc7ro
70 a N I
Xrt* I" W6 Yfil
FIGURE 2
f
GUARANTEE
\
This Shure product I S guaranteed In normal use t o be free from electrical and
mechanical defects f o r a period of one year from date of purchase Please relain proof of purchase date
This guarantez ~ n c l u d e s all parts and labor T h l ?
guarantee 1s In Ileu of any and all other guarantees or warranties, express or
~ m p l ~ e dand
,
there shall be no recovery f o r any c o n s e q u e n t ~ a l or ~ n c i d e n t a l
damages
SHIPPING INSTRUCTIONS
Carefully repack the unlt and return it p r e p a ~ dto
Shure Brothers Incorporated
Attentlor'
Servlce Department
1501 West Shure D r ~ v e
Arlington H e ~ g h t s l l l ~ n o ~60004
s
I f outslde the Unlted States, return the u n ~ tt o your dealer or Authorlzed Shurp
Servlce Center f o r repair The unlt w i l l be returned to you prepaid
7
J
MODEL PE54 SPECIFICATIONS (Continued)
Switch:
S l ~ d e - t o - t a l k , l o c k ~ n g type
swivel assembly
Connector:
Equipped w ~ t h Amphenol MC3F type female connector
On-Off switch,
lntegral part
of
Shock Mount:
Internal rubber vibration-lsolator
Case:
Chrome-plated d i e castlng
stainless steel g r i l l e
Cable:
6 . l m (20 ft) single-conductor shielded cable wlth Amphenol
MC3M type male connector on m ~ c r o p h o n e e n d and '/4 i n
phone plug o n equipment e n d
Net Weight:
425 grams (15 oz) less cable
Packaged Weight:
1 16 k g (2 Ib, 9 o r )
and
black
ARMO-DUR@
w~th
FURNISHED ACCESSORY
Carrying Case:
90C1413
OPTIONAL ACCESSORIES
Desk Stand:
S338, S37A. S39A. or S40A
Disconnect
Adapter:
A47
Line Matching
Transformer:
A95 Series
Windscreen:
A2WS
REPLACEMENT PARTS
Cartridge:
R45
Switch:
RK32S
Cable:
C5-3
Cable Connector:
RK116P
Plug Element:
RK31 P
+
CABLE SHUREMICRO
A R E A CODE 3 1 2 866-2200
SHURE BROTHERS INC.
222 HARTREY AVENUE
EVANSTON, ILLINOIS 60204
U.S.A.
Copyright 1977
Shure Brothers Inc.
27A341 (QK)
Printed i n U.S.A.
U.S. Patents 3,132,713
and 3,240,883
8
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