B&K Reference 21, Owner'S Manual

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2
SAFETY PRECAUTIONS
PLEASE READ BEFORE INSTALLING
WARNING: to prevent fire or shock hazard, do not expose this unit to rain or moisture. Care should be
taken to prevent objects or liquid from entering the enclosure. Never handle the power cord with wet
hands.
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The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user of the presence
of uninsulated “dangerous voltage” within the product’s enclosure that may constitute a risk of electric shock
to you. The exclamation point within an equilateral triangle is intended to alert the user of the presence of
important operating and maintenance (servicing) instructions in the literature accompanying the unit.
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Caution: To prevent the risk of electric shock, do not remove cover. No user-serviceable parts inside. Refer
servicing to qualified service personnel.
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If an outdoor antenna is connected to the antenna input, be sure it is grounded to provide some protection
against voltage surges and built up static charges. Keep the outdoor antenna away from power lines.
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Unplug the processor from the AC outlet when plugging in or unplugging cables, when left unused for an
extended period of time, moving the processor, or when you suspect lightning in your area.
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Prevent damage to the power cord. Do not bend, pull, place objects on, alter, etc. Replace the power cord if it
becomes damaged. Always grasp the plug on the power cord when plugging in or unplugging the processor
from the AC outlet.
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Your system may produce sound levels capable of causing permanent hearing loss. Do not operate for
extended periods of time at high volume levels
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Make sure the processor is placed on a level surface.
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Protect the processor from impact. (Do not drop it!!!)
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Do not climb on top of the processor or place heavy objects on its top cover.
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The processor is equipped with raised feet to provide ventilation, reduce acoustic feedback, and provide
protection against scratching the surface the unit is resting on. We advise against removing or altering feet.
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Do not stack anything on top of the processor (processor, source, etc.) Leave a minimum of 3” clearance from
the top of the processor to the next shelf (or component).
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The processor should be located away from heat sources such as heaters or amplifiers.
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Do not perform any internal modifications to the processor.
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Always connect the processor’s power cord to an unswitched AC outlet for normal operation.
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If young children are present, adult supervision should be provided until the children are capable of following
all rules for safe operation.
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Do not plug the processor’s power cord into an outlet with an unreasonable number of other devices. Be
careful if using extension cords and ensure the total power used by all devices does not exceed the power
rating (watts/amperes) of the extension cord. Excessive loads may cause the insulation on the cord to heat
and possibly melt.
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Mistaking CONTROL OUTPUT or IR INPUT connectors for audio/video inputs or outputs may damage your
processor or other components.
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Damage may occur to your speakers if the amplifiers connected to your processor exceed the power rating of
each individual driver. Ensure that all the drivers in your system are capable of handling not only the average
power being delivered by the amplifiers, but also the peak power that is likely to be generated during strong
passages.
If you are unsure of your speaker's power rating, contact the speaker manufacturer or the dealer
where you purchased them.
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The processor should be serviced by qualified personnel when:
A.
The processor is not functioning properly.
B. Objects have entered the chassis.
C. The processor was exposed to rain or other type of moisture.
D. The processor was dropped, or the chassis is damaged.