Shure Headphones miniature microphone User Manual

Shure Brothers Incorporated  
222 Hartrey Avenue  
Evanston IL 60202-3696 U.S.A.  
Models WM98 and SM98A Users 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.  
 
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
 
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
 
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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