Shure WH20 User manual

MODEL WH20
DYNAMIC HEADSET
MICROPHONE
Model WH20 User Guide
2003, Shure Incorporated
27E3078(Rev. 5)Printed in U.S.A.

English
1
GENERAL
The Shure Model WH20 is a rugged, light-weight, dynamic headset microphone
that provides high-quality voice pickup. It fits securely for active microphone users,
such as aerobics instructors and musicians, with low visibility for stage
appearances. The WH20 is suitable for any voice communications application
where comfort and reliability are required.
The WH20 has a cardioid (unidirectional) pickup pattern. This provides greater
gain-before-feedback and isolation from ambient noise and other unwanted sound
sources, such as air-conditioning, musical instruments and loudspeakers. A
carefully shaped frequency response includes a voice-frequency presence peak
and a low-frequency rolloff to compensate for the proximity effect inherent in
cardioid microphones during close-talk operation.
An integrated elastic headband secures the headset comfortably. The headband,
wireframe, and gooseneck are adjustable to accommodate any head size or shape.
The WH20 is supplied with a foam windscreen and clothing clip.
FEATURES
SLightweight wireframe and headband adjust for a secure, comfortable fit
SExtra-strong, small-diameter attached microphone cable resists breakage
SCollapsible microphone boom for easy storage and transportation
SSmooth, natural frequency response comparable to high-quality dynamic
hand-held vocal microphones
SHigh input clipping level eliminates overload distortion
SReliable at temperature and humidity extremes
SSupplied foam windscreen and clothing clip
MODEL VARIATIONS
SThe WH20QTR has a right-angle 1/4-inch phone plug for use with Shure
Headset Wireless Microphone Systems, or any unbalanced microphone
input.
SThe WH20TQG has a miniature four-pin female connector for direct con-
nection to Shure wireless body pack transmitters.
SThe WH20XLR has a three-pin male XLR connector with a convenient
detachable belt clip.

2
English
MICROPHONE PARTS
The WH20 consists of the following parts (see Figure 1):
1
1. Microphone Cartridge
2. Microphone Boom
3. Hinged Housing
4. Cable and Cable Retainer
5. Wireframe
6. Elastic Headband
2
3
46
5
MICROPHONE PARTS
FIGURE 1
COLLAPSIBLE MICROPHONE BOOM
The WH20 headset features a collapsible boom for shipment and storage. Before
wearing the headset, unfold the boom until it snaps and locks into place. Refold
for storage or transportation.
WEARING THE HEADSET
Place the headset wireframe around the head so that the wireframe and elastic
band are horizontal across the back of the head and the ends of the wireframe
fit over and in front of the ears. Position the elastic headband either above or below
the wireframe to provide the greatest comfort and stability. The white “SHURE”
should face outward (see Figure 2).

English
3
WEARING THE HEADSET
FIGURE 2
POSITIONING THE MICROPHONE
FIGURE 3
ADJUSTING THE HEADSET
SIf the headset feels loose or uncomfortable, carefully bend the sides of the
wireframe to make it tighter or looser (Figure 4A). The angle of the wire-
frame earpieces may also need adjustment (Figure 4B).
SAdjust the tension of the elastic headband across the back of the head by
sliding it up or down the ends of the wireframe (see Figure 5).
B
AADJUSTING THE WIREFRAME
FIGURE 4

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English
ELASTIC HEADBAND ADJUSTMENT
FIGURE 5
POSITIONING THE MICROPHONE
IMPORTANT: For maximum gain before feedback, position the gooseneck so
that the microphone grille (silver side) is within 25 mm (1 inch) of the right corner
of the mouth. Do NOT position it directly in front of the mouth (see Figure 3).
USING THE CLOTHING CLIP
The supplied spring-loaded clothing clip secures the microphone cable to the user’s
clothing and keeps it from becoming entangled with the user’s movements.
OPERATION
Connect the WH20 to the microphone input of a wireless microphone transmitter
or a balanced wired microphone input.
NOTE: The WH20 is a dynamic microphone and has inherently lower output
than condenser microphones. The transmitter gain may need to be increased
to compensate for the WH20’s lower output.
WINDSCREEN
If breath noise or “popping” is audible over the sound system, install the supplied
windscreen.
WASHING THE FOAM WINDSCREEN
The foam windscreen protects the WH20’s microphone-element from dirt and
moisture. When necessary, it can be removed and cleaned in a mild soapy water
solution.
IMPORTANT: Never clean the windscreen with any liquid solution without first
removing the windscreen from the microphone boom.
1. Gently pull the windscreen away from microphone.
2. Immerse the windscreen in mild soapy water and gently squeeze it several
times.

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3. Rinse the windscreen in clean water and dry it with a clean cloth or paper towel.
Allow it to air-dry thoroughly.
4. When the windscreen is dry, slide it over the WH20 microphone.
WASHING THE ELASTIC HEADBAND
The elastic headband can be removed from the wireframe and hand-washed in a
mild soapy water solution. To remove and wash the headband, follow these steps:
1. Remove the microphone cable retainer from the wireframe.
2. Slide the elastic headband off the wireframe.
3. Wash the headband and allow to dry thoroughly.
4. Slide the headband around the wireframe to its original position. Reattach the
cable with the plastic retainer.
Note that the elastic headband supplied with the WH20 is not a standard size;
headbands purchased in stores are too long for this application.
SPECIFICATIONS
Type
Dynamic, Close-Talking
Frequency Response (at 8 mm)
50 to 15,000 Hz (see Figure 6)
500 1,000 2,000 5,000 10,000 20,00050 100 20020
0
–10
+10
Hz
dB
TYPICAL FREQUENCY RESPONSE
FIGURE 6

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English
Polar Pattern
Cardioid (unidirectional) response—uniform with frequency, symmetrical about
axis (see Figure 7)
150o
120o
150o
120o
180o
30o
60o
90o
30o
60o
90o
–5 dB
–10 dB
–15 dB
–20 dB
0
500 Hz
1000 Hz
4000 Hz
TYPICAL POLAR PATTERNS
FIGURE 7
Impedance
Microphone rating impedance is 150 ohms (200 ohms actual)
Output Level (close talked* at 1,000 Hz)
Open Circuit Voltage –67.0 db/Pa (0.45 mV). . . . . . . . . . . . . . . . . . . . . (1 Pa = 94 dB SPL)
*At 12.5 mm (1/2inch)
Hum Sensitivity
38.4 dB equivalent SPL in a 1 millioersted field
Polarity
WH20QTR as a wired microphone: Positive sound pressure on diaphragm pro-
duces positive voltage on tip with respect to sleeve (ground) of microphone
output phone plug connector.
WH20QTR, WH20TQG used with Shure Wireless Systems:
1/4-inch Phone Jack Receiver Outputs: Positive sound pressure on diaphragm
produces positive voltage on tip of receiver output connector.
3-pin XLR Receiver Outputs: Positive sound pressure on diaphragm produces
positive voltage on pin 2 with respect to pin 3 of low-impedance output con-
nector, and on tip of Aux output connector.
WH20XLR as a wired microphone: Positive sound pressure on diaphragm pro-
duces positive voltage on pin 2 with respect to pin 3 of microphone output XLR
connector.

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7
Environmental Conditions
Operating Temperatures: –18°to 60°C (0°to 140°F)
Storage Temperatures: –29°to 74°C (–20°to 165°F)
Humidity: 0 to 95%
Cable
Attached 1.22 m (4 ft), small-diameter, shielded, PVC-jacketed, two-conductor.
Cable Connector
WH20QTR: Right-angle 1/4-inch phone plug
WH20TQG: Female 4 pin mini connector (TA4F)
WH20XLR: Three-pin XLR with detachable belt clip
Construction
Black thermoplastic housing; stainless steel grille; black TEFLON-coated stain-
less steel wireframe; flexible plastic-clad monel gooseneck; rubber/nylon elas-
tic headband
Net Weight (including connector)
WH20: 63 g (2.2 oz)
WH20TQG: 63 g (2.2 oz)
WH20XLR: 98 g (3.5 oz)
CERTIFICATION
Eligible to bear CE Marking. Conforms to European EMC Directive 89/336/EEC.
Meets applicable tests and performance criteria in European Standard EN55103
(1996) parts 1 and 2, for residential (E1) and light industrial (E2) environments.
REPLACEMENT PARTS
Cable Connector (for WH20TQG only) WA330. . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector Belt Clip (forWH20XLR only) RK200BC. . . . . . . . . . . . . . . . . . . . . . . .
Black Elastic Headband RK319. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Black Elastic Headband and Wireframe RPM600. . . . . . . . . . . . . . . . . . . . . . . . .
Microphone, Cable and Connector Assembly:
1/4-inch (WH20QTR only) RPM100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mini, four pin connector (WH20TQG only) RPM102. . . . . . . . . . . . . . . . . . . . .
XLR (WH20XLR only) RPM104. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Black Windscreens (2) and Clothing Clip RK318WS. . . . . . . . . . . . . . . . . . . . . .

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English
2
31
TIP
SLEEVE
RED
BLACK 4
SHIELD
MODEL
WH20QTR
MODEL
WH20XLR
MODEL
WH20TQG
CARTRIDGE MINI FOUR PIN CONNECTOR
CARTRIDGE
2
3
1
BLACK
RED
SHIELD
CARTRIDGE
RED
1/4” CONNECTOR
XLR CONNECTOR
+
+
BLACK
+
SHIELD
WIRING DIAGRAMS
FIGURE 8

Trademark Notices: The stylized Shure logo and the words “Shure” are
registered trademarks of Shure Incorporated in the United States. “Teflon” is a
registered trademark of E.I. duPont de Nemours and Company in the United
States.
SHURE Incorporated Web Address: http://www.shure.com
222 Hartrey Avenue, Evanston, IL 60202–3696, U.S.A.
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