Model 503BG, Specifications | Shure instruction

Model 503BG User Guide

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 mounts to a gooseneck, a fixed pipe or a microphone stand using a standard 5/8º-27 thread. To secure the mounted BG503, tighten the 4-40 screw with the supplied #4 Allen (hex- head) wrench.

Features

Optimized performance in voice processing and computer voice recognition applications.

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)

SPECIFICATIONS

Type

Dynamic, unidirectional (cardioid), close-talking

Frequency Response

100 to 7,000 Hz (Figure 1)

1 cm*

5 cm*

* distance from speaker to microphone grille

TYPICAL FREQUENCY RESPONSE

FIGURE 1

Impedance

170 ohms actual

Output Level (Open Circuit Voltage)

±61.5 dBV/Pa (.84mV)*

±41.5 dB (8.4 mV)**

*1 Pa = 94 dBSPL **0 dB = 1V/100 μbar

Polarity

Positive pressure on diaphragm produces positive voltage on white conductor with respect to black conductor (Figure 2)

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