The Shure WH20 is a Rugged, Lightweight, Dynamic Headset Microphone

Model# SU-WH20XLR

Dynamic Simple, rugged diaphragm/coil. handles extreme volume levels without distortion.Recommended Uses Live Vocals Available Options WH20QTR Includes right-angle 1/4" phone plug for unbalanced mic input WH20TQG Includes miniature 4-pin female connector for Shure bodypack transmitters WH20XLR (Wired) Includes 3-pin male XLR connector w/ detachable belt clip The Shure WH20 is a rugged, lightweight, 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 cardioid (unidirectional) pickup pattern provides greater gain-before-feedback and isolation from ambient noise and other unwanted sound sources. A carefully shaped frequency response includes a voice-frequency presence peak and a low-frequency roll-off to compensate for the proximity effect inherent in cardioid mics during close-talk operation.

Features
• Lightweight wireframe and elastic headband adjust for a secure, comfortable fit	• High input clipping level eliminates overload distortion
• Extra-strong, small-diameter attached microphone cable resists breakage	• Reliable at temperature and humidity extremes
• Collapsible microphone boom for easy storage and transportation	• Supplied foam windscreen and clothing clip
• Smooth, natural frequency response comparable to high-quality dynamic hand-held vocal microphones

Details
Type Dynamic, Close-Talking Frequency Response (at 8 mm) 50 to 15,000 Hz View Larger Polar Pattern Cardioid (unidirectional) response -- uniform with frequency, symmetrical about axis Impedance Microphone rating impedance is 150 ohms (200 ohms actual) Output Level (close talked (at 12.5 mm (1/2 inch)) at 1,000 Hz) Open Circuit Voltage: -67.0 db/Pa (0.45 mV) (1 Pa = 94 dB SPL) Hum Sensitivity 38.4 dB equivalent SPL in a 1 millioersted field Polarity WH20QTR as a wired microphone: Positive sound pressure on diaphragm produces 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 connector, and on tip of Aux output connector. WH20XLR as a wired microphone: Positive sound pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3 of microphone output XLR connector. Environmental Conditions Operating Temperatures: -18 to 60 degrees C (0 to 140 degrees F) Storage Temperatures: -29 to 74 degreesC (-20 to 165 degrees 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 wireframe; 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)