3
Lend Me Your Ears
Exposure to extremely
high noise levels may cause
permanent hearing loss. In-
dividuals vary considerably
in susceptibility to noise-
induced hearing loss, but nearly everyone
will lose some hearing if exposed to suffi-
ciently intense noise for a period of time.
The U.S. Government’s Occupational
Safety and Health Administration (OSHA)
has specified the permissible noise level ex-
posures shown in this chart.
According to OSHA, any exposure in ex-
cess of these permissible limits could result
in some hearing loss. To ensure against po-
tentially dangerous exposure to high
sound-pressure levels, it is recommended
that all persons exposed to equipment ca-
pable 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 pre-
vent a permanent hearing loss if exposure is
in excess of the limits set forth here.
Contents
SAFETY INSTRUCTIONS .............................................................................................................2
INTRODUCTION ...........................................................................................................................4
REAR PANEL DESCRIPTION ........................................................................................................4
HOOKUP DIAGRAM .....................................................................................................................5
CONNECTIONS ............................................................................................................................5
PLACEMENT .................................................................................................................................6
AC POWER ...................................................................................................................................6
THERMAL CONSIDERATIONS .....................................................................................................6
SERVICE INFORMATION .............................................................................................................7
CARE AND MAINTENANCE .........................................................................................................8
SA1521 SPECIFICATIONS ...........................................................................................................9
FREQUENCY RESPONSE GRAPH ..............................................................................................10
SA1521 LIMITED WARRANTY ...................................................................................................11
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Duration Per Day
Sound Level dBA, Typical
In Hours
Slow Response
Example
8
90
Duo in small club
6
92
4
95
Subway Train
3
97
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
The SA1521
can produce a
maximum SPL of
133 dB @ 1m
Part No. 820-262-00 Rev. C 11/03
© 2003 LOUD Technologies Inc. All Rights Reserved.
