Shure 527B User Manual

Model 527B User Guide

CARTRIDGE SWITCH CABLE

Dynamic Communications Microphone

Features

• Extended low- and high-frequency response

• Highly intelligible voice response

• Unparalleled ruggedness and reliability

• Moving coil (dynamic) element

• ARMO-DUR case

• “Million-Cycle” leaf-type switch controlling microphone and
external relay or switching circuits

• Modular construction for easy field service

• “Lifetime” hang-up button and mounting bracket

• Long-life neoprene-jacketed coil cord

APPLICATIONS

GENERAL

The 527B microphone is an extremely reliable handheld
dynamic microphone with an extended low- and
high-frequency response particularly suited to ham radio
use, mobile FM transmission, and top-quality paging
systems. The microphone has a clear, crisp, and natural
voice response. It features small size, light weight, and
modular construction.

The modular construction of the 527B permits ease of field
serviceability. The design of the cartridge, switch, and cable
makes them easily replaceable. The microphone is wired to
prevent lead breakage or crimping.

The unit fits naturally and comfortably in the hand and is not

affected by heat or humidity. The exclusive ARMO-DUR
case is immune to oil, grease, fumes, salt spray, sun, rust,
and corrosion and is outstanding in its ability to withstand
mechanical shocks and vibrations. The “Million-Cycle”
leaf-type switch is designed to withstand severe operating
conditions and constant usage.

BUTTON MOVEMENT

BLACK

+

INTERNAL CONNECTIONS

FIGURE 1

BLACK

RED

GREEN
WHITE



The 527B microphone is highly recommended for all types
of mobile communications, ham radios, industrial and
commercial paging systems, and outdoor public address
systems. The 527B is a low-impedance microphone and is
recommended where long cable lengths are required.

INSTALLATION

A quick release mounting bracket for permanent installation
is supplied with each microphone. The bracket has
mounting holes with clearance for No. 6 or No. 8 screws
(see Figure 4).

CONNECTIONS

The internal switch connections of the 527B are shown in
Figure 1. The 527B has a four-conductor, coiled cord cable
and a double-pole, single-throw, leaf-type switch to control
the microphone circuit and an external relay or switching
circuit. The WHITE and GREEN leads are the audio
conductors for balanced-line connection to the microphone
circuit; the shield is connected to the microphone circuit
ground (see Table 1).

INPUT TYPE

BALANCED

UNBALANCED

WIRE

COLOR

WHITE AUDIO + PIN 2 TIP

GREEN AUDIO - PIN 3 RING

SHIELD GROUND PIN 1 SLEEVE

WHITE AUDIO - TIP

GREEN GROUND - SLEEVE

SHIELD GROUND - SLEEVE

CABLE-TO-CONNECTOR WIRING

FUNCTION XLR

CONNECTOR

TABLE 1

1/4 IN.

PHONE PLUG

©2014 Shure Incorporated

27C2083 (Rev. 7)

Printed in U.S.A.

The 527B is wired for balanced-line operation and is

3.688 in.

[9.37 cm]

1.765 in.

[4.48 cm]

.375 in.

[.95 cm]

.750 in.

[1.91 cm]

.093 in.

[.24 cm]

.062 in.

[.16 cm]

.032 in.

[.08 cm]

2.625 in.

[6.67 cm]

46 mm

36.5 mm

4.7 mm

34.5 mm

10.3 mm

9.5 mm

9.1 mm

(23/64 IN.)

(3/8 IN.)

(1-3/4 IN.)

(1-7/16 IN.)

(3/16 IN.)

(1-23/64 IN.)

(13/32 IN.)

MOUNTING HOLES,
CLEARANCE FOR
No. 8 SCREWS

recommended for use where long cable lengths are
required, or areas where strong noise fields may exist. The
527B microphone can be fed directly into a standard
low-impedance amplifier, or a Shure A95 Series Line
Matching Transformer can be used for coupling the 527B to
the input of a high-impedance amplifier. A two-conductor
shielded cable can be used for extending only the
microphone circuit. If both the microphone circuit and the
remote circuit are to be extended, a four-conductor cable,
having two shielded conductors for the microphone, should
be used.

OPERATION

Dimensions (See Figure 3)

The 527B will operate satisfactorily under all ordinary
conditions of humidity, heat, and cold. Dropping the
microphone or other severe mechanical shocks should be
avoided.

SPECIFICATIONS

Type

Dynamic

Frequency Response

300 to 5,000 Hz (see Figure 2)

+10

0

–10

RELATIVE RESPONSE IN dB

5020

100

432

FREQUENCY IN HERTZ

9876543298765

20000100001000

TYPICAL FREQUENCY RESPONSE

FIGURE 2

Sensitivity (at 1,000 Hz)

Open Circuit Voltage* ......................-53 dBV/Pa (2.2

mV)
*1 Pascal=94 dB SPL

Impedance

Microphone impedance rating is 150  (200  actual) for
connection to microphone inputs rated at 19 to 300 

Switch

Double-pole, single-throw, leaf-type

Cable

Attached, 1.8 m (6 ft), 4-conductor (2 shielded),
neoprene-jacketed

OVERALL DIMENSIONS

FIGURE 3

MOUNTING BRACKET

FIGURE 4

Net Weight

337 g (11.9 oz)

Packaged Weight

533 g (18.8 oz)

Certification

Meets European Union EMC Emissions and Immunity
Requirements (EN 50081-1: 1992, EN 50082-1: 1992).

FURNISHED ACCESSORY

Mounting Bracket (3 in kit)..............................................RK6MB

REPLACEMENT PARTS

Cartridge.............................................................................R131

Switch............................................................................ RK319S

Cable ................................................................................. C29C

SHURE Incorporated http://www.shure.com
United States, Canada, Latin America, Caribbean:
5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.
Phone: [phone] U.S. Fax: [phone] Intl Fax: [phone]
Europe, Middle East, Africa:
Shure Europe GmbH, Phone: [phone] Fax: [phone]
Asia, Pacific:
Shure Asia Limited, Phone: [phone] Fax: [phone]