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 sufficiently intense noise for a period of time. The U.S. Government’s Occupational Safety and Health Administration (OSHA) has specified 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 recommended 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

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

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

Warranty Service .......................................................................................................

7

Troubleshooting ..........................................................................................................

7

Repair .......................................................................................................................

8

CARE AND MAINTENANCE .........................................................................................................

8

SA1521 SPECIFICATIONS ...........................................................................................................

9

Architects and Engineers’ Specifications .....................................................................

10

FREQUENCY RESPONSE GRAPH ..............................................................................................

10

SA1521 LIMITED WARRANTY ...................................................................................................

11

Don’t forget to visit our website at www.mackie.com

for more information about this and other Mackie products.

Part No. 820-262-00 Rev. C 11/03

© 2003 LOUD Technologies Inc. All Rights Reserved.

3