Model WH20 User Guide
©2005, Shure Incorporated
27G3078 (Rev. 7)
Printed in U.S.A.
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MICROPHONE PARTS
The WH20 consists of the following parts:
1. Microphone Cartridge
2. Microphone Boom
3. Hinged Housing
4. Cable and Cable Retainer
5. Wireframe
6. Elastic Headband
MICROPHONE PARTS
FIGURE 1
COLLAPSIBLE MICROPHONE BOOM
The WH20 headset features a collapsible boom for shipment and storage. Before wear-
ing 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.
4
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WEARING THE HEADSET
POSITIONING THE MICROPHONE
FIGURE 2
FIGURE 3
ADJUSTING THE HEADSET
•
If 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 wireframe earpieces may also need adjustment
(Figure 4B).
•
Adjust 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).
A
B
ADJUSTING THE WIREFRAME
FIGURE 4
5
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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 cloth-
ing 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 bal-
anced 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.
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.
6
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WASHING THE ELASTIC HEADBAND
The elastic headband can be removed from the wireframe and hand-washed in a mild soapy wa-
ter 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; head-
bands purchased in stores are too long for this application.
SPECIFICATIONS
Type
Dynamic, Close-Talking
Frequency Response (at 8 mm)
50 to 15,000 Hz
+10
0
–10
20
50
100
200
500 1,000 2,000
5,000 10,000 20,000
Hz
TYPICAL FREQUENCY RESPONSE
FIGURE 6
7
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Polar Pattern
Cardioid (unidirectional) response-uniform with frequency, symmetrical about axis
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ꢀꢁꢂƒ
ꢀꢁꢂƒ
ꢀꢃꢂƒ
ꢀꢃꢂƒ
ꢇꢂƒ
ꢇꢂƒ
±ꢃꢂꢈG%
±ꢀꢁꢈG%
±ꢀꢂꢈG%
±ꢁꢈG%
ꢆꢂƒ
ꢆꢂƒ
ꢁꢂꢂꢈ+]
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ꢉꢂꢂꢂꢈ+]
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ꢂƒ
TYPICAL POLAR PATTERNS
FIGURE 7
Impedance
Rated at 150 ohms (200 ohms actual)
Output Level (close talked* at 1,000 Hz)
Open Circuit Voltage: . . . . . . . . . . . . . . . . . . . . . . . . . . -67.0 db/Pa (0.45 m)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Pa = 94 dB SPL
*At 12.5 mm (1/2 inch)
Hum Sensitivity
38.4 dB equivalent SPL in a 1 millioersted field
Polarity
WH20QTR as a wired microphone: Positive sound pressure on diaphragm produces pos-
itive 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 produc-
es 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 connector, and on tip of
Aux output connector.
8
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WH20XLR as a wired microphone: Positive sound pressure on diaphragm produces positive volt-
age on pin 2 with respect to pin 3 of microphone output XLR connector.
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 stainless steel wire-
frame; flexible plastic-clad monel gooseneck; rubber/nylon elastic 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 residen-
tial (E1) and light industrial (E2) environments.
REPLACEMENT PARTS
Cable Connector (for WH20TQG only) ................................................................WA330
Connector Belt Clip (for WH20XLR 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
9
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CARTRIDGE
1/4” CONNECTOR
RED
+
WH20QTR
BLACK
SHIELD
XLR CONNECTOR
CARTRIDGE
1
2
SHIELD
BLACK
+
WH20XLR
3
RED
MINI FOUR-PIN CONNECTOR
RED
CARTRIDGE
+
3
1
BLACK
SHIELD
WH20TQG
4
2
WIRING DIAGRAMS
FIGURE 8
10
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United States, Canada, Latin America, Caribbean:
5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.
Phone: 847-600-2000 U.S. Fax: 847-600-1212 Int’l Fax: 847-600-6446
Europe, Middle East, Africa:
Shure Europe GmbH, Phone: 49-7131-72140 Fax: 49-7131-721414
Asia, Pacific:
Shure Asia Limited, Phone: 852-2893-4290 Fax: 852-2893-4055
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