Shure 545L Manuale utente
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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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