Shure 401A Datasheet

CONTROLLED MAGNETICB COMMUNICATIONS MICROPHONES
2 2 2 H A R T R E Y A V E N U E
S H U e B
EVANSTON, ILLINOIS 8 0 2 0 2 - 3 6 9 6 U.S.A.
THE SOUNO OF THE PAOFESSlONALS~ UlORLWlDE
MICROPHONES AND ELECTRONIC COMPONENTS
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GENERAL
The Shure 401 Series hand-held communications
microphones are compact size, CONTROLLED
MAGNETIC@ units designed for clear, crisp, natural
voice response of high intelligibility.
DATA SHEET
MODELS 401A and 401 B
Microphone Features:
w
Frequency response from 200 to 4,000 Hz especially
suitable for voice communications use
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Small, light and compact case, fits comfortably and
firmly in the palm of the hand
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Extremely sturdy, high impact, ARMO-DUR@ case,
lighter and stronger than die-cast metal, comfortable
to the touch in hot or cold weather
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Heavy-duty, long-life, push-to-talk switch
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Durable rubber-jacketed coil cable
w Rugged and dependable under all operating conditions
APPLICATIONS
The 401 Series microphones are especially recom-
mended for all types of outdoor-indoor communication
activity: in mobile and fixed station use (as in police,
fire, utility, forestry, and transportation services), and in
commercial and industrial applications-including
radiotelephone, amateur radio, and similar uses. The
microphones are also suitable for indoor and outdoor
public address.
The 401A is a high-impedance microphone with high
output level, making it suitable for connection to high-
impedance amplifier inputs when cable lengths of
15.2m (50 ft) or less are needed.
The 401B is a low-impedance microphone and is
recommended when long cable lengths are required or
under conditions where severe hum pickup may exist.
The 4018 can be connected directly to the input of a
low-impedance amplifier, or a Shure A95 Series Line
Matching Transformer can be used for connecting the
401B to the input of a high-impedance amplifier (addi-
tional connector required).
MOUNTING
A mounting bracket for permanent installation is sup-
plied with each microphone. (See Figure 1)
MOUNTING HOLES,
CLEARANCE FOR
No 8 SCREWS
-
10.3 mm
(13/32 IN.)
1 9 . 5 mm 34.5 mm
4
( 3 / 8
IN.)
L(1-23/64 IN)
MOUNTING BRACKET
FIGURE 1
CONNECTIONS
The internal switch connections of the 401A and 401 B
are shown in Figure 2.
MODEL 401A MODEL 4010
INTERNAL CONNECTIONS
FIGURE 2
The 401A is a high-impedance microphone with a
three-conductor, coiled-cord cable (one conductor
shielded), and a double-pole, double-throw switch to
control the microphone circuit and an external relay or
switching circuit. The WHITE lead is the "hot" conduc-
tor for connection to the microphone circuit ground. The
RED and BLACK leads control the relay or switching cir-
cuit.
The 4018 is a low-impedance microphone with a four-
conductor, coiled-cord cable (two conductors shielded),
and a double-pole double-throw switch to control the
microphone circuit and an external relay or switching
circuit. The GREEN and WHITE leads are the "hot" con-
ductors for balanced-line connection to the microphone
circuit; the shield is connected to the microphone cir-
cuit ground. The RED and BLACK leads control the relay
or switching circuit.
Copyright 1993, Shure Brothers Inc.
27A198 (MD)
Printed in U.S.A.