Shure 503BG User Manual

Model 503BG User Guide

1 cm*

5 cm*

dB

Hz

* distance from speaker to microphone grille

MODEL 503BG

Unidirectional Dynamic Microphone

Developed for computer voice recognition applications,
the 503BG microphone offers excellent voice fidelity while
reducing background noise. Also use the 503BG in other
close-talking applications such as paging and talkback.

The 503BG features a low-impedance, moving coil type
transducer with an integral humbucking coil and an attached
two-conductor shielded cable with a built-in strain relief. It
produces a frequency response with an essentially constant
output voltage over the voice spectrum when used close to
the sound source.

The 503BG’s case is aluminum with a black enamel finish.
It mount s to a gooseneck , a fixed pipe or a microphone stand
using a standard 5/8”-27 thread. To secure the mounted
BG503, tighten the 4-40 screw with the supplied #4 Allen (hex­head) wrench.

Features

 Optimized performance in voice processing and

computer voice recognition applications.

SPECIFICATIONS

Type

Dynamic, unidirectional (cardioid), close-talking

Frequency Response

100 to 7,000 Hz (Figure 1)

СССССССССССССССССССССССССССССС

TYPICAL FREQUENCY RESPONSE

Impedance

170 ohms actual

Output Level (Open Circuit Voltage)

–61.5 dBV/Pa (.84mV)*
–41.5 dB (8.4 mV)**

Polarity

Positive pressure on diaphragm produces positive voltage

on white conduct or with respect to black conductor (Figure 2)

FIGURE 1

*1 Pa = 94 dBSPL

**0 dB = 1V/100 µbar

 Smooth frequency response with excellent fidelity

in the voice range.

 Cardioid pickup pattern and close-talking opera-

tion keep unwanted signals and background noise
at low levels.

 Constant output over voice spectrum when close

talked.

 Humbucking coil minimizes undesirable hum

effects such as CRT interference.

 Low-impedance design permits long cable runs in

extreme hum fields.

 Small unobtrusive design does not interfere with

CRT visibility.

 Rugged and reliable for years of consistent

operation.

2007 Shure Incorporated
27C8091 (Rev. 7)

INTERNAL CONNECTIONS

FIGURE 2

Hum Pickup

Maximum 15 dB equivalent SPL in m0e field

Cable

1.2 m (4 ft) two-conductor shielded

Case

Aluminum with black enamel finish; stainless steel
screen.

Printed in U.S.A

Net Weight

128 g (4.5 oz)

Dimensions

See Figure 3

OVERALL DIMENSIONS

FIGURE 3

Operation

For best performance, speak as close to the 503BG as com­fort permits. A distance of 1 to 5 cm (0.4 to 2 inches) provides
the greatest discriminations between voice and background
noise.

Acoustic Considerations

The 503BG maximizes performance in close-talking applica­tions thr ough its tailored frequency response, direct ionality and
distance discrimination. It optimizes and controls sounds within
the 100 to 7000 Hz frequency range and reduces sounds out­side that range. The BG503 rejects noise thr ough its inherent
directional properties and disc riminates against distant sounds
in favor of close-r ange sounds.

OPTIONAL ACCESSORIES

In-Line On-Off-Momentary Switch A120S. . . . . . . . . . . . . .

12-Inch Gooseneck G12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18-Inch Gooseneck G18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-Inch Gooseneck (Side Vent) G6A. . . . . . . . . . . . . . . . . . . . .

18-Inch Gooseneck (Side Vent) G18A. . . . . . . . . . . . . . . . . . .

12-Inch Gooseneck (Side Vent, 3-Pin Conn.) G12-CN. .
18-Inch Gooseneck (Side Vent, 3-Pin Conn.) G18-CN. .

Mounting Flange A12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heavy-Duty Mounting Flange A13HD. . . . . . . . . . . . . . . . . . .

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]