JBL CSM 28, Operation Manual

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3.0 Operation
3.1 Precautions
Your unit is protected from internal and external faults, but you should still take the
following precautions for optimum performance and safety:
1. Before use, your unit first must be configured for proper operation, including
input and output wiring hookup. Improper wiring can result in serious operating
difficulties.
For information on wiring and configuration, please consult the Setup section of
this manual.
2. Use care when making connections, selecting signal sources and controlling the
output level.
3. Always be sure to have all levels at minimum when connecting or disconnecting
audio sources from the inputs, especially when MIC is selected from the MIC/
LINE switch. Failure to do so may cause the amplifier or speaker to go into a
protection mode or even cause damage.
4. WARNING: Never connect the output to a power supply, battery or power main.
Electrical shock may result.
5. Tampering with the circuitry, or making unauthorized circuit changes may be
hazardous and invalidates all agency listings.
6. Do not operate the unit with the red Clip LEDs constantly flashing.
7. Do not overdrive the unit, which will cause clipped signal to be sent to the
unit. Such signals will be reproduced with extreme accuracy, and loudspeaker
damage may result.
8. Use the unit in a well-ventilated environment and do not use it in ambient
temperature conditions in excess of 40°C.
CAUTION: JBL is not liable for damage that results from overdriving other
system components.