Shure Microphone 545SD User Manual

Shure Brothers Incorporated  
222 Hartrey Avenue  
Evanston IL 60202-3696 U.S.A.  
Model 545SD User Guide  
SET SCREW  
PLUG  
ELEMENT  
PIN 3  
IMPEDANCE  
SELECTION SOCKET  
IMPEDANCE SELECTION—  
RECEPTACLE END OF MICROPHONE  
FIGURE 1  
GENERAL  
POLARITY  
R
The UNlDYNE III Model 545SD is a dual-impedance, uni-  
directional, dynamic microphone. Shipped connected for low-  
impedance operation, it features a silent magnetic reed on/off  
switch.  
All cables and microphones should be tested to ensure  
that they have the same polarity. To test two microphones  
and/or their cables for proper polarity, connect them to an ampli-  
fier and talk or sing into them while holding them three or four  
inches apart. The sound from the speakers should be the same  
when talking into either microphone or directly between them.  
If the sound drops drastically, or if a dead spot is found when  
talking between the two microphones, either the microphones  
or their cables have opposite polarity.  
The UNlDYNE III is a favorite for instrument pickup and re-  
cording, and can be used on lecterns for public address sys-  
tems such as those used in political conventions and legisla-  
tures, convention halls, hotels, public auditoriums, stadiums,  
schools, and churches.  
To change the polarity of a microphone cable, either use  
a Shure A15PRS phase reverser or interchange the wires con-  
nected to pins 2 and 3 of the three-pin connector at one end of  
the cable. To change the polarity of a microphone, the micro-  
phone cartridge leads must be interchanged. This should be  
performed by your dealer, the Shure Factory Service Depart-  
ment, or other qualified service personnel.  
FEATURES  
S
Exceptionally uniform cardioid pattern minimizes feedback  
in PA applications  
S
S
S
S
Selectable dual–impedance operation  
Silenat magnectic reed on/off switch with lock option  
Cardioid dynamic  
SPECIFICATIONS  
Frequency response: 50 to 15,000 Hz  
Type  
CONNECTIONS  
Dynamic  
When using the microphone with a balanced input, pins 2  
Frequency Response  
and 3 are the audio signal carriers. When using the microphone  
withanunbalancedinput, useacablewiredwithpin2asthesig-  
nal carrier and pin 3 connected to the cable shield (ground),  
such as the Shure C20HZ high-impedance cable.  
50 to 15,000 Hz (see Figure 2)  
Polar Pattern  
Cardioid (unidirectional)—uniform with frequency, sym-  
metrical about axis (see Figure 3)  
IMPEDANCE SELECTION  
lmpedance  
The microphone is shipped connected for low impedance  
operation. To change to high impedance, proceed as follows  
(refer to Figure 1):  
Dual. Microphone rating impedance is 150 ohms (250  
ohms actual) for connection to microphone inputs rated  
at 19 to 300 ohms and “High” for connection to high-im-  
pedance microphone inputs.  
Wired for low impedance as supplied. To change impe-  
dance, see sections on lmpedance Selection and Con-  
nections.  
1. Remove plug element at receptacle end of microphone by  
turning slotted setscrew in (counterclockwise) and carefully  
withdrawing plug element from case.  
2. Disconnect 2–terminal impedance selection socket from  
rear of plug element.  
3. Reconnect 2–terminal impedance selection socket in re-  
verse position so that pin 3 of plug element is inserted in  
socket terminal “H” (White).  
4. Reassemble plug element into microphone and seal set-  
screw securely by turning out (clockwise).  
Output Level (at 1,000 Hz)  
“L”  
“H”  
Open Circuit Voltage* . . . . . . . . . . –58.0dB  
(1.3 mV)  
*0 dB = 1 volt per Pascal (1 Pa = 94 dB SPL)  
–35.0 dB  
(17.6 mV)  
E1999, Shure Brothers Incorporated  
Printed in U.S.A.  
27A3059 (SC)  
 

Sharp CRT Television 27C540 User Manual
Snapper Chipper 1692371 User Manual
Solid State Logic Music Mixer C300 HD User Manual
Sony Camera Accessories MSAC M2 User Manual
Sony Car Stereo System XVM R70 User Manual
Sony Photo Printer DPP SV77 User Manual
Sony Printer SVM 25LW User Manual
Stiga Lawn Mower 85 M User Manual
Sub Zero Refrigerator IC 18F User Manual
Sun Microsystems Server iPlanet Web Server User Manual