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2 2 2 HARTREY AVE.. EVANSTON. IL. 6 0 2 0 4 U.S.A.
8
MODELS 548,548SD,
and
548SH
1
:K~T
UNIDYNEm IV
AREA CODE 3121866-2200
CABLE: SHUREMICRO
TWX: 9 1 0 - 2 3 1 - 0 0 4 8
TELEX: 7 2 - 4 3 8 1
SERIES
I
8
I
U A I A
A R E A CODE 3121866.2200
CABLE: SHUREMICRO
SHEET
,
and
548SH
UNIDYNE~ IV
SERIES
I
UNIDIRECTIONAL DYNAMIC MICROPHONES
GENERAL
The UNIDYNEB IV Models 548,548SD, and 548SH are
dual-impedance unidirectional dynamic microphones
shipped connected for low-impedance operation. The
units provide wide range reproduction of music and
voice and can be effectively used outdoors and indoors.
The UNIDYNE IV is ideal for use by professional
entertainers in high quality theater-stage sound sys-
tems and recording, as well as in critical public-address
systems such as those used in political conventions
and legislatures, convention halls, hotels, public audi-
toriums, stadiums, cathedrals and churches.
Microphone Features:
.
Unusually effective cardioid (unidirectional) pickup
pattern reduces feedback (annoying loudspeaker
"squeals") and prevents echoing (boominess) that
sometimes occurs in partially filled halls. Can also
be used closer to loudspeakers than usual without
creating feedback problems
Response especially effective for announcing, nar-
ration, vocal and instrumental music
Shock-mounted cartridge for quiet operation
Convenient selection of either high or low imped-
ance
The UNIDYNE IV has an exceptionally uniform uni-
directional pickup pattern that provides an effective
.
Built-in long-life On-Off switch (548SH, 548SD, and
solution to feedback problems in reverberant locations,
548SD-CN)
permits best utilization of space in small studios,
facilitates orchestral placement, and excludes un-
.
Rugged professi~nal three-pin audio connector on
wanted background noise.
the microphone
The UNIDYNE IV features an extremely rugged all
.
Strong, detachable cable especially selected for
effective shielding from hum pickup
metal case and a shock-mounted cartridge, insensitive
to handling noise or mechanical vibration.
.
Supplied with an .050" wrench and a 4-40 socket
setscrew (see Figure 4) to securely lock the micro-
Models 548 and 548SD can be used as hand-held
phone to the cable connector (548, 548SD, and
microphones or they can be stand-mounted with the
548SD-CN)
supplied A25B slip-in swivel adapter. Model 548 is
designed for applications -where
a
switch is not re-
.
Versatile-for
use in the hand or on a stand-
quired; Model 548SD is equipped with a magnetic reed
indoors or outdoors
On-Off switch. Model 548SH has an On-Off switch on
the attached swivel assembly for stand-mounting.
.
Rugged and dependable under all operating con-
ditions
VARIATION
Available in four versions: without switch (548),
with magnetic reed On-Off switch (548SD), with
Model 548SD-CN: Same as Model 548SD, except
magnetic reed On-Off switch and three-pin pro-
supplied with professional three-pin male audio con-
fessional audio-connector on equipment end of
nector on equipment end of cable. (See Specifications
cable (548SD-CN), and with On-Off switch mounted
for details on cable.)
on attached swivel assembly (548SH).
Copyright 1980, Shure Brothers Inc.
27A1559
(TC)
U.S. Patents 3,132,713, and 3,240,883
Printed in U.S.A.
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