QSC KW181, Руководство пользователя

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Additional Features
Standby
All KW Series models are equipped with an automatic standby feature to conserve energy when the systems are not in use. If no signal is present on
any input, or the gain knob is turned to off for five minutes, the power amplifier goes into standby and the green STBY LED illuminates. In this mode,
the amplifier is powered down. A small amount of current will continue to flow from the AC power source into the power supply of the KW Series.
This current keeps the power supply and DSP “awake” to reduce turn on time when the system is brought out of standby. The power-up time of the
amplifier is negligible and is shorter than the latency of the DSP, so no signal is cut off when the KW Series system is brought out of standby. A KW
Series loudspeaker can also be manually brought out of standby by turning the POWER switch off and then back ON.
Front LED Functions
The front LED may be set to any of three modes by the FRONT LED switch on the rear panel.
• From the factory, the FRONT LED switch is set to the PWR position. The front LED illuminates
brightly when the POWER switch is in the ON position.
• When the FRONT LED switch is in the OFF position, the front LED is not illuminated. This
setting is recommended in applications where the front LED may be visually objectionable.
• When the FRONT LED switch is in the LIMIT position, the front LED tracks the LIMIT LED on
the rear panel. When the KW Series is in limiting (meaning that one or more of the limiters
is engaging to protect some part of the system) the front LED glows brightly in response to
the limiting function. This allows the system operator to have awareness of the status of the
limiters without needing to see the rear of the unit. For more information see the section
below on the rear LIMIT LED. When not in limiting and when the unit is not in standby, the
front LED is dimly illuminated.
Rear LIMIT LED
The red LIMIT LED can indicate that limiting has taken place to protect and avoid damage to
the amplifier or loudspeaker. If the signal level at any frequency is too high, the DSP limits the
signal to prevent damage and the red LIMIT LED illuminates. If the amplifier is too hot due
to prolonged use at extreme SPL levels or the environment is too hot, the red LIMIT LED is
illuminated. If the red LIMIT LED is on when both GAIN controls are at minimum for 10 minutes,
your KW Series loudspeaker requires service by qualified personnel or should be moved to a
cooler environment.
Front LED Switch
LIMIT LED