4
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. Please also refer to the included safety and warranty manual for more information.
Caution:
To reduce the risk of electric shock, do not connect the subwoofer to a power
outlet while the grille is removed.
Stand-Mounting
•
Always install subwoofers in accordance with applicable electrical and building codes.
•
Install the subwoofer according to its maximum weight. Check the specifications of your
stand or pole to ensure it can support the loudspeaker’s weight. Also, observe all safety
precautions specified by the manufacturer.
•
Do
not
mount multiple loudspeakers on the same stand or pole.
•
Always verify that the stand or pole is on a flat, level, and stable surface.
•
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 loudspeaker’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, pulling the loudspeaker off the stand or pole.
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 SPL
(
dB
)
Example
8 90
Small
gig
6 92
Train
4 95
Subway
train
3
97
High level desktop monitors
2
100
Classical music concert
1.5 102
Riveting
machine
1 105
Machine
factory
0.5 110
Airport
0.25 or less
115
Rock concert
