Shure 545L User Manual

Model 545L User Guide

Unidirectional Dynamic Microphone

GENERAL

The Shure Model 545L unidirectional dynamic micro­phone is a low-impedance unit designed for instrument or
voice pickup in public address applications. With its attached
cable, the microphone is suitable for mounting on an optional
A25B swivel adapter, on a fixed pipe or flexible gooseneck, or
for handheld use.

The 545L is ideal for use in critical public address sys­tems such as those used in political conventions and legisla­tures, hotels, public auditoriums, stadiums, and churches.
The microphone has an exceptionally uniform pickup pattern
that provides an excellent solution to feedback problems in
reverberant locations, permits best utilization of space in
small studios, facilitates orchestral placement, and provides
effective rejection of unwanted noises.

Features

S Effective cardioid pickup pattern, uniform to low fre-

quencies, minimizes reverberation and feedback,

discriminates against pickup of nearby performers

and extraneous noise

S Excellent reproduction of music and voice

S Shock-mounted cartridge for quiet operation

S Low impedance for unlimited cable length

S Provided with very flexible, small diameter

shielded cable

S Rugged and dependable under all operating

conditions

SPECIFICATIONS
Type

Dynamic

Frequency Response

50 to 15,000 Hz (see Figure 1)

TYPICAL FREQUENCY RESPONSE

Figure 1

Polar Patern

Cardioid (unidirectional)—uniform with frequency, symet­rical about axis (see Figure 2)

2003, Shure Incorporated
27B2632 (Rev. 7)

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TYPICAL POLAR PATERNS

Figure 2

Printed in U.S.A.

Impedance

Microphone rating impedance is 150 Ω (250 Ω actual) for
connection to microphone inputs rated at 75 to 300 Ω

Phasing

Positive pressure on diaphragm produces positive voltage
on BLACK cable lead (see Figure 3).

CARTRIDGE

INTERNAL CONNECTIONS

FIGURE 3

Sensitivity (at 1,000 Hz)

Open Circuit Voltage: – 57.5 dBV/Pa* (1.3 mV)
*(1 Pa = 94 dB SPL)

Cartridge Shock Mount

Internal rubber vibration isolator

CABLE

6.1 m (20 ft) two-conductor shielded, attached, small diam­eter cable

Dimensions

See Figure 4

OVERALL DIMENSIONS

Figure 4

Net Weight

354 grams (12–1/2 oz)

GOOSENECK MOUNTING

To mount the 545L on a gooseneck or fixed pipe with a
5/8”–27 thread, unscrew (turn counterclockwise) the end cap
at the cable end of the microphone, and remove the end cap
and strain relief by sliding them down the length of the cable.
Fish the cable through the gooseneck or pipe and firmly
thread the microphone to the mount.

OPTIONAL ACCESSORIES

Swivel Adapter. A25B. . . . . . . . . . . . . . . . . . . . . . . . . . .

Line Matching Transformer A95 Series. . . . . . . . . . . . .

Gooseneck (12 in., 18 in.) G12, G18. . . . . . . . . . . . . . .

Windscreen A2WS-GRA. . . . . . . . . . . . . . . . . . . . . . . . .

REPLACEMENT PART

Cartridge R45L. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Case

Silver finish aluminum and ARMO-DUR
steel screen

R

with stainless

SHURE Incorporated Web Address: http://www.shure.com
5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.
Phone: [phone] Fax: [phone]
In Europe, Phone: [phone] Fax: [phone]
In Asia, Phone: [phone] Fax: [phone]
Elsewhere, Phone: [phone] Fax: [phone]

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