Shure Brothers Incorporated
222 Hartrey Avenue
Evanston IL 60202-3696 U.S.A.
Models WM98 and SM98A User’s Guide
MODEL WM98 AND SM98A MINIATURE CONDENSER MICROPHONES
The
W
M98 is supplied with a versatile shock–mount swivel adapter
MICROPHONE
for ounting on a standard 5/8”–27
m
thread, a 1.12 m (3 ft 8 in.) cable
with miniature 3– and 4–pin connectors (Switchcraft TA3 and TA4
types), and an acoustic foam windscreen to minimize wind noise in
POLAR
MODIFIER
outdoor
The
ered reamplifier, is furnished with t
included ccessories are: a windscreen f
alone, and a windscreen for use with the A98SPM, a shock-mount
swivel dapter a d a detachable 4 6 m ( 5 f ) cable with Switchcraft
“Tini Q–G” connectors.
The LP-1 preamplifier provides switchable gain of 0 or +
switch-selectable lat or Low-Cut response to suit pickup f
a
pplications and from air–moving equipment.
hure ILP-1, ow-distortion high-clipping-level, phantom–pow-
e SM98A microphone. Additional
r u e with the icrophone
S
l
p
h
a
o
s
m
a
n
.
1
t
SWIVEL
ADAPTER
I
1
o
0 dB and
r various
F
PREAMPLIFIER
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
tom upply from sound reinforcement, recording, or broadcast equip-
ment.
Optional accessories, designed exclusively for with the WM98
f
ans. T
h
e ILP-1 c
a
n be powered by a
n
y 1
1
– to 52–volt d
c
phan-
s
GENERAL
Shure odels
microphones ith a unidirectional (cardioid) pickup pattern. A smooth
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-
use
M
WM98 and SM98A are miniature electret condenser
and SM98A, are available. These include the following:
w
•
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.
-
•
-
-
ture
The
coming from t
reinforcement
20,000 e microphone
instrument n an ensemble or orchestra.
t
h
e 98 microphone element.
ardioid polar response o
e rear, permitting higher gain before feedback in sound
pplications. With i s true cardioid pattern extending t
n often be used f r pickup of a particular
c
f
the 98 discriminates against sounds
h
a
Microphone Features:
t
o
•
Smooth, wide frequency response for accurate sound repro-
duction across the entire audio spectrum
H
z, th
ca
o
i
•
•
•
•
Symmetrical cardioid pattern, uniform with frequency to 20 kHz
Very high sound pressure level capability
When still stronger rejection of off-axis pickup is required, the
A98SPM Supercardioid Polar Modifier should be used. This device
Very low distortion and high output clipping level
changes
the pickup pattern from cardioid to supercardioid with mini-
Low susceptibility to RFI, electrostatic and electromagnetic
hum
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
•
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)
the
A very high maximum sound pressure level allows use of the 98
with l acoustic instruments including drum kits a d other percussion
WM98.
al
n
•
•
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
as well as brass, reed, wind, string, and keyboard instruments. The
98 can also be used with amplified guitars and keyboards.
The
WM98
can be connected directly to a Shure wireless transmit-
•
ter using the supplied cable; other transmitters must be checked for
proper pin configuration, condenser microphone power supply, and
connector type.
TYPICAL FREQUENCY RESPONSE – SM98A WITH
A98SPM POLAR MODIFIER INSTALLED
FIGURE 2
TYPICAL FREQUENCY RESPONSE
FIGURE 1
E1997 Shure Brothers Incorporated
27A2738 (QF)
Printed in U.S.A.
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Dimensions
See Figure 5
31.8 mm
(1-1/4 IN.)
98 MICROPHONE
11.9 mm
(15/32 in.)
138 mm
(5-7/16 in.)
CABLE RETAINED IN GUIDE
20 mm
(13/16 in.)
FIGURE 8
ILP–1 PREAMPLIFIER (SM98A)
5. Tilt the adapter to aim the microphone as desired.
6. To remove the microphone without disturbing the swivel adapt
er and cable, reach into the open slot of the adapter and press
the cable-lock button while disengaging the microphone.
-
WM98: 1.12 m (3 ft 8 in.)
SM98A: 4.6 m (15 ft)
TA4F
(WA330)
PREAMPLIFIER PERMANENT MOUNTING (SM98A)
TA3F
The supplied mounting clamps are intended to hold the pre
-
amplifier in place in permanent installations (see Figure 9). Use
either one or two clamps depending on location and application.
OVERALL DIMENSIONS
FIGURE 5
1.0 µF
V out
100 K
20 K
5V
3
1
4
2
+
–
WM98 STANDARD TEST CIRCUIT
FIGURE 6
MOUNTING CLAMPS – SM98A PREAMPLIFIER
INSTALLATION
To mount the 98 in the supplied swivel adapter:
1. Mount the adapter on a microphone stand.
FIGURE 9
PREAMPLIFIER SWITCHES
The preamplifier case contains two miniature recessed slide
switches. In the Lo Cut position, the Flat/Lo Cut switch provides
2. Attach the microphone to the connector
.
3. Slip the cable through the slot in the adapter. Slide the connec
-
tor back through the hole until the protruding black cable lock
button is in the open slot and the back of the microphone itself
a
12 dB rolloff below 80 Hz (see Figure 1). The effects of the 0/+10
dB Gain switch are described in the Preamplifier Output Clipping
Level specifications.
stops flush with the front of the holder. Only the silver metal seg
ment of the connector is held by the holder (see Figure 7).
-
INSTALLING THE A98SPM
The A98SPM Supercardioid Polar Modifier is supplied with
the SM98A and is an optional accessory for the WM98. To mount
the microphone in an A98SPM Polar Modifier, proceed as follows.
IMPORTANT
The white internal element of the A98SPM is es-
sential to maintaining the supercardioid polar pat-
tern. Do not remove it!
1. Unscrew the rear support from the front support by turning the
rear support counterclockwise (from bottom). See Figure 10.
2. Insert the microphone (cable not connected) into the rear sup
-
port with its connector end contacting the support.
3. Attach the front and rear supports together by turning the rear
support clockwise (from bottom). Tighten sufficiently to prevent
rattling.
SWIVEL ADAPTER MOUNTING
FIGURE 7
CAUTION
4. Slide the cable through the slot in the cable guide and make a
large loop (see Figure 8). Then route the cable away from the
stand to prevent transmission of noise and vibration through
the cable.
Do not overtighten. Damage to the internal element
may result.
3
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REASSEMBLING THE PREAMPLIFIER (SM98A)
1. Make sure the pc board is seated in the slot of the end cap and
that no wires are pinched.
2. Insert the end cap-board assembly into the case, XLR connect
ing wires first. Again, take care not to pinch the wires connect
ing the board to the end cap.
-
-
REAR
SUPPORT
CABLE AND
CONNECTOR
MICROPHONE
FRONT
SUPPORT
3. Rotate the assembly inside the case until the four holes for Phil
lips screws line up with the holes in the case.
-
A98SPM ASSEMBL
Y
FIGURE 10
4. Replace the four Phillips screws.
5. Resolder the three lead wires to the back of the XLR board as
shown in Figure 11.
4. Mount the swivel adapter on the microphone stand.
5. Attach the microphone cable to the 98-A98SPM.
6. Mount the Microphone-Polar Modifier combination in the
adapter as in steps 3 through 5 of the Installation section.
2
1
7. To remove the microphone assembly from the swivel adapter
without disturbing the adapter and cable, reach into the open
3
BLACK
slot of the adapter and press the cable-lock button while disen
gaging the microphone.
-
RED
BLUE
WIRING TO XLR PC BOARD TERMINALS
FIGURE 11
6. Replace the XLR board-connector assembly in the case, lining
up the key in the connector with the slot in the case. Take care
not to engage the butterfly-shaped ground contact in the key
slot as it will prevent seating the connector properly
.
1. At the XLR connector end of the preamplifier, turn the slotted
head setscrew fully inward (counterclockwise), and use a long-
nose pliers to carefully withdraw the connector from the case.
7. Insert the connector fully in the case until the slotted setscrew
can be seen in the case hole; tighten the setscrew firmly by
turning it clockwise.
2. Unsolder the three lead wires securing the XLR connector to
the XLR board.
Horn Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A98KCS
.
3. Remove all four Phillips-head screws from the preamplifier
case (three on the switch side, one on the back).
Supercardioid Polar Modifier*
Windscreen (for A98SPM)**
.
. . . . . . . . . . . . . . . . . . . A98SPM
.
. . . . . . . . . . . . . . . . . . . . . . 49A82
4. Grasp the end cap and withdraw the cap assembly, pc board
assembly, and connecting wires and jacks from the case.
*Supplied with SM98A.
**Supplied with A98SPM.
REPLACEMENT PARTS LIST
Reference
Designation
Part
Number
Commercial
Alternate
Description
Preamplifier (SM98A)
A1
90B4220
ILP-1 Preamplifier Assembly
None
A2
90HZ2600
66A264
Pc Board Assembly
None
MP1
MP2
P1
Preamp Switch Cover
None
80A476
Mounting Clamp
All States 3/4-HNB
Switchcraft TB3M
None
95A8077
90HV2600
Plug Assembly, Male, Miniature 3–Pin
XLR-3M Connector and Pc Board Assembly
P2
Microphone
MK1
MP3
MP4
MP5
MP6
P1
R134
Microphone Cartridge-Housing
None
49A66A
A98SPM
49A82
Windscreen, Microphone
None
Supercardioid Polar Modifier (optional for WM98)
Windscreen, Polar Modifier (optional for WM98)*
Swivel Adapter
None
None
RK282
95A8077
WA330
None
Plug Assembly, Male, Miniature 3–Pin
Connector, Female, Miniature, 4–Pin
Switchcraft TB3M
Switchcraft TA4F
Part of W1
(WM98)
W1 (SM98A)
C107
Cable–connector assembly, 4.6 m (15 ft), two-conductor
shielded, 3-pin (female) Switchcraft “Tini Q–G” connectors
,
None
None
W1 (WM98)
90A4039
Cable–connector assembly, 1.47 m (5 ft .), two conductor,
shielded, 3– and 4–pin Switchcraft “Tini Q–G” connectors
4
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3–PIN MINIATURE
CONNECTOR
(TB3M)
CONDENSER
CARTRIDGE
IMPEDANCE
CONVERTER
RED DOT
RED
2
D
S
G
3
1
BLUE
C1
MK1
C2
U1
BLACK
98 MICROPHONE
RED
RED
2
1
2
3
3
1
1
3
3
1
2
2
BLACK
SHIELD
BLACK
SHIELD
4
MODEL WM98 CABLE
MODEL SM98A CABLE
MICROPHONE WIRING DIAGRAMS
FIGURE 12
GRN
OR
BROW
N
OR
GAIN
90B4339C–3
NOTES:
1
UNLESS OTHERWISE SPECIFIED, ALL RESISTORS ARE 1/8 WATT, 5%.
2
3
UNLESS OTHERWISE SPECIFIED, ALL CAPACITORS IN mF, 10%, 50 V OR GREATER. ELECTROLYTIC CAPACITORS SHOWN IN mF X VOLTS, 20%.
THE FOLLOWING SYMBOLS DENOTE:
PC BOARD GROUND
CHASSIS GROUND
CIRCUIT DIAGRAM – SM98A PREAMPLIFIER
FIGURE 13
5
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