Shure Brothers Incorporated
222 Hartrey Avenue
Evanston IL 60202-3696 U.S.A.
Models 545D and 545SD User Guide
MODEL 545D
GENERAL
The UNIDYNE
®
Ill Models 545D and 545SD are dual-
impedance unidirectional, dynamic microphones shipped
connected for low-impedance operation. The microphones
provide wide range reproduction of music and voice and can
be effectively used outdoors and indoors.
The UNIDYNE Ill is ideal for use by professional enter-
tainers in high quality theater-stage sound systems and re-
cording, as well as in critical public address systems such as
those used in political conventions and legislatures, conven-
tion halls, hotels, public auditoriums, stadiums, cathedrals,
and churches.
The UNIDYNE III features an exceptionally uniform
pickup pattern-provides an effective solution to feedback
problems in reverberant locations, permits best utilization of
space in small studios, facilitates orchestral placement, and
provides practically complete exclusion of unwanted noises.
Model 545D is designed for applications where a switch
is not required. Model 545SD is equipped with a magnetic
reed On-Off switch
VARIATIONS
Model 545SD-CN: Supplied with cable (See Specifi-
cations for details on cable.)
Models 545D-LC and 545SD-LC: Supplied without
cable.
MODEL 545SD
Features
Unusually effective cardioid pickup pattern reduces
feedback (annoying loudspeaker “squeals”) and pre-
vents echoing (boominess) that sometimes occurs in
partially filled halls. Can also be used closer to loud-
speakers than usual without creating feedback prob-
lems
Excellent reproduction of voice and music
Shock mounted cartridge for quiet operation
Quick, neat, solderless impedance selection
Built-in, long-life, magnetic reed ON/OFF switch
(545SD)
Rugged professional three-pin audio connector on the
microphone
Strong,
detachable cable especially selected
for effec-
tive
shielding from hum pickup (545SD-CN)
Versatility-for use in the hand or on a stand-indoors
or outdoors
Available in three versions: without switch or cable
(545D-LC), with switch and cable (545SD-CN), and
with switch but without cab/e (545SD-LC)
© 1998, Shure Brothers Incorporated
27A2237 (RA)
Printed in U.S.A.
