Important Safety Precautions; Sound Level - Alto Professional Black Série Guide D'utilisation

Important Safety Precautions

Please note: Alto Professional and inMusic are not responsible for the use of its products or
the misuse of this information for any purpose. Alto Professional and inMusic are not
responsible for the misuse of its products caused by avoiding compliance with inspection and
maintenance procedures.
Installation
•
Always install subwoofers in accordance with applicable electrical and building codes.
•
Install the subwoofer according to its maximum weight. Check the specifications of your
stage to ensure it can support the subwoofer's weight. Also, observe all safety precautions
specified by the manufacturer.
•
Do not mount multiple subwoofers on the same stand or pole.
•
Always verify that the stand or pole is on a flat, level, and stable surface. Also, fully extend
the legs of tripod-style stands, and ensure its legs do not present a trip hazard.
•
Inspect the stand (or pole and associated hardware) before each use and do not use
equipment with worn, damaged, or missing parts.
•
Always be cautious in windy, outdoor conditions. You may need to place additional weight
(e.g., sandbags) on stand's base to improve stability. Do not attach banners or similar
items to any part of a loudspeaker system. Such attachments could act as a sail and
topple the system.
•
Unless you are confident that you can handle the subwoofer's weight, ask another person
to help you lift it onto the stand or pole.
•
Make sure your cables are out of the way of performers, production crew, and audience so
they will not trip over them.

Sound Level

Permanent hearing loss may be caused by exposure to extremely high noise levels. The U.S.
Occupational Safety and Health Administration (OSHA) has specified permissible exposures to
certain noise levels. According to OSHA, exposure to high sound pressure levels (SPL) in
excess of these limits may result in hearing loss. When using equipment capable of generating
high SPL, use hearing protection while such equipment is under operation.
Hours per day
8
6
4
3
2
1.5
1
.50
.25 or less
SPL (dB) Example
90 Small gig
92 Train
95 Subway train
97 High level desktop monitors
100 Classical music concert
102 Riveting machine
105 Machine factory
110 Airport
115 Rock concert
4