Shure 545L Manuale utente

– 1 –

GENERAL

The Shure Model 545L unidirectional dynamic micro-

phone 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 sys-

tems such as those used in political conventions and legisla-

tures, 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

SEffective cardioid pickup pattern, uniform to low fre-

quencies, minimizes reverberation and feedback,

discriminates against pickup of nearby performers

and extraneous noise

SExcellent reproduction of music and voice

SShock-mounted cartridge for quiet operation

SLow impedance for unlimited cable length

SProvided with very flexible, small diameter

shielded cable

SRugged 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, symet-

rical about axis (see Figure 2)

TYPICAL POLAR PATERNS

Figure 2

Model 545L User Guide

Unidirectional Dynamic Microphone

27B2632 (Rev. 7)

2003, Shure Incorporated Printed in U.S.A.

– 2 –

Impedance

Microphone rating impedance is 150 Ω(250 Ωactual) 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 diam-

eter cable

Case

Silver finish aluminum and ARMO-DURRwith stainless

steel screen

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SHURE Incorporated Web Address: http://www.shure.com

5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.

Phone: 800-257-4873 Fax: 847-600-1212

In Europe, Phone: 49-7131-72140 Fax: 49-7131-721414

In Asia, Phone: 852-2893-4290 Fax: 852-2893-4055

Elsewhere, Phone: 847-600-2000 Fax: 847-600-6336

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