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Models WM98 and SM98A User
’
s Guide
Shure
Brothers Incorporated
222 Hartrey A
venue
Evanston IL 60202-3696 U.S.A.
27A2738
(QF)
E
1997 Shure Brothers Incorporated
Printed in U.S.A.
MODEL WM98 AND SM98A MINIATURE CONDENSER MICROPHONES
MICROPHONE
POLAR
MODIFIER
SWIVEL
ADAPTER
PREAMPLIFIER
GENERAL
Shure
M
odels
W
M9
8 a
n
d S
M98
A a
r
e m
iniatur
e e
lectre
t c
ondenser
microphones
w
ith
a u
nidirectiona
l (
cardioid
) p
icku
p p
attern
. A s
mooth
wide frequency response from 40 to 20,000 Hz makes the micro-
phones well suited for musical instrument pickup. The WM98 is for
wireless use; the SM98A is for wired applications. Both models fea-
ture
t
h
e 9
8 m
icrophon
e e
lement.
The
c
ardioi
d p
ola
r r
espons
e o
f
t
h
e 9
8 d
iscriminate
s a
gains
t s
ounds
comin
g f
ro
m t
h
e r
ear
, p
ermittin
g h
ighe
r g
ai
n b
efor
e f
eedbac
k i
n s
ound
reinforcement
a
pplications
. W
it
h i
t
s t
ru
e c
ardioi
d p
atter
n e
xtendin
g t
o
20,000
H
z
, t
h
e m
icrophone
c
a
n o
fte
n b
e u
se
d f
o
r p
icku
p o
f a p
articular
instrument
i
n an e
nsembl
e o
r o
rchestra.
When still stronger rejection of off-axis pickup is required, the
A98SPM Supercardioid Polar Modifier should be used. This device
changes
t
h
e p
icku
p p
atter
n f
rom
c
ardioi
d t
o s
upercardioi
d w
it
h m
ini-
mal change of on-axis microphone frequency response. With the
A98SPM the 98 becomes the smallest multi-pattern microphone
available, eliminating the need for costly multiple capsules. The
A98SPM is supplied with the SM98A; it is an optional accessory for
the
W
M98.
A very high maximum sound pressure level allows use of the 98
with
a
l
l a
cousti
c i
nstrument
s i
ncludin
g d
ru
m k
it
s a
n
d o
the
r p
ercussion
as well as brass, reed, wind, string, and keyboard instruments. The
98 ca
n a
ls
o be u
se
d w
it
h a
mplifie
d g
uitars and keyboards.
The
W
M98
c
a
n b
e c
onnecte
d d
irectl
y t
o a S
hur
e w
ireles
s t
ransmit-
ter using the supplied cable; other transmitters must be checked for
proper pin configuration, condenser microphone power supply, and
connector
t
ype.
TYPICAL FREQUENCY RESPONSE
FIGURE 1
The
W
M9
8 i
s s
upplie
d w
ith
a v
ersatil
e s
hock–moun
t s
wive
l a
dapter
for
m
ountin
g o
n a s
tandar
d 5
/8”–27
t
hread
, a 1
.1
2 m (
3 f
t 8 i
n.
) c
able
with miniature 3– and 4–pin connectors (Switchcraft TA3 and TA4
types), and an acoustic foam windscreen to minimize wind noise in
outdoor
a
pplications an
d f
ro
m a
ir–movin
g e
quipment.
The
S
hur
e I
LP-1,
l
ow-distortio
n h
igh-clipping-level
, p
hantom–pow-
ered
p
reamplifier
, i
s f
urnishe
d w
it
h t
h
e S
M98
A m
icrophone
. A
dditional
included
a
ccessorie
s a
re
: a w
indscree
n f
o
r u
s
e w
it
h t
he
m
icrophone
alone, and a windscreen for use with the A98SPM, a shock-mount
swivel
a
dapte
r a
n
d a d
etachabl
e 4
.
6 m (
1
5 f
t
) c
abl
e w
it
h S
witchcraft
“Tini Q–G” connectors.
The
I
LP-
1 p
reamplifie
r p
rovide
s s
witchabl
e g
ai
n o
f 0 o
r +
1
0 d
B a
nd
switch-selectable
F
la
t o
r L
ow-Cu
t r
espons
e t
o s
ui
t p
icku
p f
o
r v
arious
instruments. The Low-Cut position is also useful to filter out low-fre-
quency noise from such sources as wind noise or air conditioner or
heater
f
ans
. T
h
e I
LP-
1 c
a
n be p
owere
d b
y a
n
y 1
1
– t
o 5
2–vol
t d
c
p
han-
tom
s
uppl
y f
ro
m s
oun
d r
einforcement
, r
ecording
, o
r b
roadcas
t e
quip-
ment.
Optiona
l a
ccessories
, d
esigne
d e
xclusivel
y f
or
u
se
w
it
h t
h
e W
M98
and
S
M98A
, a
r
e a
vailable
. T
hes
e i
nclud
e t
h
e f
ollowing:
• A98MK
Drum Kit, with gooseneck holder and clamp for mount
-
ing
the microphone directly on most drums.
• A98KCS
Horn Mount, a shock-mounted clamp designed espe
-
cially
for securely mounting the 98 on a horn, wind, or reed in
-
strument.
Microphone
Features:
• Smooth, wide frequency response for accurate sound repro-
duction
across the entire audio spectrum
• Symmetrical
cardioid pattern, uniform
with frequency to 20 kHz
• Very
high sound pressure level capability
• V
ery low distortion and high output clipping level
• Low susceptibility to RFI, electrostatic and electromagnetic
hum
• Smallest
multi-pattern microphone available – without the need
for
multiple capsules
•
Rugged construction for outstanding reliability
• Cable
detachable at both microphone and transmitter (WM98)
or
preamplifier (SM98A)
•
Usable over very wide range of temperature and humidity
• Supplied
with unique shock-mount swivel adapter for mounting
on
conventional microphone stands or goosenecks
•
Optional accessories to increase microphone versatility
TYPICAL FREQUENCY RESPONSE – SM98A WITH
A98SPM POLAR MODIFIER INSTALLED
FIGURE 2