Shure Microphone 27C687 User Manual

Model 522 User Guide  
AUDIO CONNECTIONS  
Unbalanced high-impedance operation:  
Set the impedance switch to the “HI” position (as shipped). Connect the  
GREEN cable lead and the shield to the amplifier chassis ground. The  
WHITE cable lead is the “hot” conductor.  
Balanced-line low-impedance operation:  
Set the impedance switch to the “LO” position. Connect the shield to the  
amplifier chassis ground. The WHITE and GREEN cable leads are the  
“hot” conductors.  
Table 1. Cable-to-Connector Wiring  
INPUT TYPE  
WIRE  
COLOR  
FUNCTION  
XLR  
1/4 IN.  
PHONE  
PLUG  
CONNECTOR  
WHITE  
AUDIO  
PIN 2  
PIN 3  
TIP  
GREEN  
AUDIO  
SLEEVE  
GROUND  
UNBALANCED  
BALANCED  
SHIELD  
CHASSIS  
GROUND  
PIN 1  
SLEEVE  
WHITE  
GREEN  
SHIELD  
AUDIO +  
AUDIO –  
PIN 2  
PIN 3  
PIN 1  
TIP  
RING  
SLEEVE  
CHASSIS  
GROUND  
MODEL 522  
BASE-STATION MICROPHONE  
The Model 522 is  
a
dynamic base-station microphone for radio  
communications, paging, and dispatching systems. Its cardioid  
(unidirectional) pickup pattern suppresses unwanted background noise  
from nearby dispatchers, ventilating equipment, or office machines.  
It also can reduce feedback in public address paging applications.  
Features  
Dual impedance (19 to 300 ohms or High)  
lmpedance change switch for convenient change-over  
Finger-tip control bar (locking or non-locking action) to actuate  
microphone circuit and an external relay or control circuit  
Long-life switch to satisfy rigorous requirements of  
communications and paging systems  
Sturdy, high impact ARMO-DUR®‚ base and microphone case  
Adjustable microphone height  
Dependable under most operating conditions  
PRESS-TO-TALK SWITCH OPERATION  
Press and hold the bar switch to talk. To lock the switch, press and pull it  
forward. To unlock the switch, move the bar back and release.  
IMPEDANCE SELECTION  
Use the switch located under the microphone base, near the cable entry,  
to select high ("HI") or low ("LO") impedance.  
Use the low-impedance position for long cable lengths under conditions  
of severe hum disturbance. Use Shure Model A95 Series Line Matching  
Transformers when using a low-impedance microphone line with a high-  
impedance amplifier input.  
LOGIC CONNECTIONS  
The RED and BLACK leads may be used to control an external relay or  
switching circuit.  
27C687 (Rev. 6)  
©2012 Shure Incorporated  
Printed in U.S.A.  
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