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SHURE-QUALITY IS OUR FIRST CONSIDERATION
Congratulations on the purchase of your new Shure microphone. it
will serve you faithfully even in the most difficult circumstances.
Because more than 50 years of experience with microphones has taught
us one thing: they are not always used under ideal conditions. Far
from it! So Shure develops, designs, builds, and tests them for the worst
conditions we can imagine.
We know they'll be flung into equipment boxes after performances.
We know they'll be called upon to function at humidity levels near 100%.
We know they'll be left in the direct rays of the midday sun for hours,
waiting for outdoor concerts to begin. Professional vocalists depend
upon their microphones much as musicians depend upon their in-
struments, but many don't hesitate to throw
thew Shure microphones across the stage and down on the floor-violently-as part of their per-
formance. They never give it a second thought. They know that Shure
microphones shrug off abuse that would make others fail.
Shure reliability begins during the design stage. Shure has a staff of
specialists whose sole function is to uncover any weaknesses before
Shure microphones are put into quantity production. During the testing
process, microphones are:
Heated at temperatures up to
85OC (185OF) often for entire days
Frozen down to
-46OC (-50") for half-hour periods during the heat
test
Shaken from side to side, back and forth, and up and down,
simultaneously and violently
Subjected to steamy humidities-up to 100% at room temperature
and
93% at 38OC (lOO°F)
Subjected to ultraviolet rays, salt sprays, alcohol, sand, and water
And for good measure, dropped repeatedly 2 meters (6 ft) onto hard-
wood floors.
That is our standard test procedure. All during production, units chosen
at random are put through these same tests. Failure of any one
microphone brings production to a halt until the original design re-
quirements are again met.
That's why at Shure we say, quality is our first consideration. The pur-
chasers of the millions of microphones bearing the name Shure during
past years, and those now buying
their.first Shure microphone can rely
on us to continue to follow the philosophy and policies that keep Shure
microphones working dependably -year after year after year.
Quality is our first consideration!
BASIC MICROPHONE TECHNIQUE
Good microphone technique will add to your effectiveness as a per-
former. Keep the following points in mind when using your Shure Profes-
sional Entertainer Microphone.
1. Maintain the proper distance from the microphone. When you want a
warm, full sound, get close to the microphone and lower your voice.
For a wide open, driving sound, raise your voice and back away from
the microphone to avoid overdriving the amplifier into distortion.
2. Don't change your distance from the microphone needlessly as this
will affect the level of sound coming from the loudspeakers.
3. Your Shure PE Microphone is your link to the audience. Consider the
microphone an instrument and develop your technique through
practice.
FEEDBACK AND UNIDIRECTIONAL MICROPHONES
A performer's worst enemy in using a microphone is "feedback". This
is a harsh hum, howl, or squeal that occurs when the microphone picks
up sound from the loudspeakers,
reamplifies and rebroadcasts it over
and over again. This vicious circle results in feedback.
A unidirectional microphone aids in preventing feedback because it
rejects sound that originates from the sides and rear. Sound pickup
from the sides is reduced by about one half, and pickup from the rear is
reduced by about nine tenths. You can demonstrate this reduction in
pickup by repeating "Test one, two" or some other convenient phrase as
you rotate the microphone from front to back.
Using unidirectional microphones close to the performer or instru-
ment ensures that the direct sound will be much louder than the
feedback-producing amplified sound. Because the amplifier gain can be
turned up less to achieve the desired overall loudness, the amplified
sound will likely remain below the volume that triggers feedback.
Other helps in preventing feedback are: keep the loudspeaker as far
to the sides as possible; be sure that the microphones point toward the
performers and away from the loudspeakers; and make certain that any
stage monitor speakers are positioned in front of the performers and
face the insensitve rear of the microphone. UNIDIRECTIONAL
MICROPHONES, OMNIDIRECTIONAL
MICROPHONES. AND PROXIMITY EFFECT
Because of their usefulness in reducing the likelihood of feedback,
unidirectional microphones are best in sound reinforcement and public
address; while omnidirectional microphones are best in recording
where feedback problems do not arise, or for close-miking instruments
and amplifiers. When unidirectional microphones are used close to a vocalist or
musical instrument, there is an increase in bass (low-frequency) output
called proximity effect. At a distance of about
6mm (Ih in.) a typical in-
crease is shown on the curve below.
I i i iiiiiiii i illiiiil . . I' TYPICAL
.. . mrmwv IN rmz
Proximity effect can be used to improve your sound.
1. With vocalists, it increases warmth, giving a fuller quality to the
voice.
2. With instruments, it provides a flat or boosted bass output without
tone controls,
s~mply by changing the distance between source and
microphone; and close miking provides natural isolation by minimiz-
ing bass pickup of other instruments.
Most Shure unidirectional microphones are designed with a bass
response that provides control at low frequencies yet still allows prox-
imity effect to be used advantageously when desired. To employ prox-
imity effect, you need to hear the amplified result. Just as you practice
your instrument, you will want to practice your microphone technique to
get the precise sound you want. (A good way to hear the actual result of
proximity effect is to 'use monitor speakers or headphones if they are
available.)
omnidirectional microphones do not exhibit proximity effect when
used
closeup. Because the response does not change with angle or
distance from the performer, an omnidirectional microphone is valuable
when the sound must stay the same for several performers positioned
around the microphone, or for a performer who moves from place to
place during a play or interview. But be aware of feedback problems that
may occur if omnidirectional microphones are used when sound
amplification is present.
CHOOSING A MICROPHONE EXTENSION CABLE
Low-impedance microphones can be used with practically unlimited
lengths of cable with no added noise or high-frequency loss. Any Shure
2-conductor balanced cables
(e.g., C25B, C25E, C25F, C50F, ClOOF, or C20H) can be used as extension cables for Shure low-impedance
microphones. These cables can also be used in any required lengths or
combinations between a low-impedance microphone and the
C25G Low- to-High-Impedance Cable-Transformer or between the microphone and
an A95UF Matching Transformer.
High-impedance microphone cables are usually limited to 6.lm (20 ft)
to avoid high-frequency loss or possible noise pickup. If longer cables
are needed with high-impedance microphones, use such Shure cables
as the
C25B, C25E, C25F or C20H to reach the required distance. Then
add the C20A to plug into the equipment. Adjust the treble control on
the equipment to compensate for the high-frequency rolloff caused by
the extra length of cable.
Look for the Shure Audio Connectionm for quality microphone cables.
GUARANTEE This Shure product is guaranteed in normal use to be free from elec-
trical and mechanical defects for a period of one year from date of pur-
chase. Please retain 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
consequential or incidental damages.
SHIPPING INSTRUCTIONS Carefully repack the unit, have it insured, and return it prepaid to:
Shure Brothers Incorporated
Attention: Service Department
222 Hartrey Avenue
Evanston, Illinois 60204
If outside the United States, return the unit to your dealer or Authorized
Shure Service Center for repair. The unit will be returned to you prepaid.
