Mackie SRM450v3 [3/20] Contents
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Mackie SRM450v3 [3/20] Contents

Mackie SRM450v3 [3/20] Contents
3
Lend Me Your Ears
Exposure to extremely
high noise levels may
cause permanent hear-
ing loss. Individuals vary
considerably in susceptibility to noise-in-
duced hearing loss, but nearly everyone will
lose some hearing if exposed to sufficiently
intense noise for a period of time. The U.S.
Government’s Occupational Safety and
Health Administration (OSHA) has speci-
fied the permissible noise level exposures
shown in this chart.
According to OSHA, any exposure in
excess of these permissible limits could
result in some hearing loss. To ensure
against potentially dangerous exposure to
high sound-pressure levels, it is recommend-
ed that all persons exposed to equipment
capable of producing these levels use hearing
protectors while this unit is in operation.
Ear plugs or protectors in the ear canals or
over the ears must be worn when operating
this amplification system in order to prevent
a permanent hearing loss if exposure is in
excess of the limits set forth here.
Duration Per Day Sound Level dBA, Typical
In Hours Slow Response Example
8 90 Duo in small club
692
4 95 Subway Train
397
2 100 Very loud classical music
1.5 102
1 105 Tami screaming at Adrian about deadlines
0.5 110
0.25 or less 115 Loudest parts at a rock concert
CONTENTS
INTRODUCTION ....................................................... 4
HOOKUP DIAGRAMS ............................................... 6
Quick Start ........................................................ 6
REAR PANEL DESCRIPTION .................................... 8
IEC Socket .................................................. 8
POWER Switch ............................................ 8
POWER ON Indicator ................................... 8
TIMED TURNOFF ......................................... 8
THERMAL Indicator ..................................... 8
CONTOUR .................................................. 9
LOW CUT .................................................... 9
LEVEL ......................................................... 9
SIGNAL PRESENT Indicator ........................ 9
PEAK Indicator ............................................ 9
INPUT Connector ........................................ 9
THRU Connector ......................................... 9
ACCESSORY Plate ...................................... 9
CONNECTIONS ...................................................... 10
PLACEMENT .......................................................... 10
RIGGING ................................................................ 11
THERMAL CONSIDERATIONS ................................ 12
AC POWER CONSIDERATIONS .............................. 12
SERVICE INFORMATION ........................................ 14
Warranty Service ............................................. 14
Troubleshooting ............................................... 14
Repair ............................................................. 16
CARE AND MAINTENANCE .................................... 16
SRM450 SPECIFICATIONS ..................................... 17
SRM450 BLOCK DIAGRAM .................................... 18
SRM450 LIMITED WARRANTY ............................... 19
Don’t forget to visit our website at www.mackie.com
for more information about this and other Mackie products.
The SRM450
can produce a
maximum SPL
of 127 dB @ 1m.
Part No. 820-158-90 Rev. A 10/03
©2003 LOUD Technologies Inc. All Rights Reserved.

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