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B-52 US Series Professional Power Amplifiers - Instruction Manual
THE BEAUTY OF POWER
US SERIES AMPLIFIERS
1. READ INSTRUCTIONS – All the safety and
operating instructions should be read before this
product is operated.
2. RETAIN INSTRUCTIONS – The safety and
operating instructions should be retained for future
reference.
3. HEED WARNINGS – All warnings on the
amplifier and in the operating instructions should
be adhered to.
4. FOLLOW INSTRUCTIONS – All operating and
use instructions should be followed.
5. WATER AND MOISTURE –
The amplifier should
not be used near water - for example, a bathtub,
washbowl, kitchen sink, laundry tub, wet basement, or
near a swimming pool, and the like.
6. CARTS AND STANDS – The amplifier should
be moved with a sturdy cart. An amplifier and cart
combination should be moved
with care. Quick stops, excessive
force, and uneven surfaces may
cause the amplifier and cart
combination to overturn.
7. INSTALLATION – Install in accordance with the
manufacturer’s instructions and local codes.
8. HEAT – The amplifier should be situated away
from heat sources such as radiators, heat registers,
stoves, or other appliances that produce heat.
9. POWER SOURCES – This product should be
operated only from the type of power source indicated
on the rating label. If you are not sure of the type
of power supply to your home, consult your product
dealer or local power company.
10. GROUNDING OR POLARIZATION – This
product may be equipped with a polarized alternation-
current line plug (a plug having one blade wider than
the other). This plug will fit into the power outlet only
one way. This is a safety feature. If you are unable to
insert the plug fully into the outlet, try reversing the
plug. If the plug should still fail to fit, contact your
electrician to replace your obsolete outlet. Do not
defeat the safety purpose of the polarized plug.
11. POWER CORD PROTECTION – Power-supply
cords should be routed so that they are not likely to be
walked on or pinched by items placed upon or against
them, paying particular attention to the cord in cor-
respondence of plugs, convenience receptacles, and the
point where they exit from the amplifier.
12. CLEANING – The amplifier should be cleaned
only as recommended by the manufacturer. Clean by
wiping with a cloth slightly damp with water. Avoid
getting water inside the amplifier.
13. NON-USE PERIODS – The power cord of the
amplifier should be unplugged from the outlet when
left unused for a long period of time.
14. OBJECT AND LIQUID ENTRY – Care should
be taken so that objects do not fall and liquids are not
spilled into the amplifier through openings.
15. DAMAGE REQUIRING SERVICE – The
amplifier should be serviced by qualified service
personnel when:
A. The power-supply cord or the plug has been
damaged; or
B. Objects have fallen, or liquid has been spilled
into the amplifier; or
C. The amplifier has been exposed to rain; or
D. The amplifier does not appear to operate
normally or exhibits a marked change in
performance; or
E. The amplifier has been dropped, or the chassis
damaged.
16. SERVICING – The user should not attempt any
service to the amplifier beyond that described in the
operating instructions. All other servicing should be
referred to qualified service personnel.
17. VENTILATION – Slots and openings in the
amplifier are provided for ventilation and to ensure
reliable operation of the product and to protect it from
overheating, and these openings must not be blocked
or covered. The openings should never be blocked
by placing the product on a bed, sofa, rug, or other
similar surface. This product should not be placed in a
built-in installation such as a bookcase or rack unless
proper ventilation as per the manufacturer’s instruc-
tions have been adhered to.
18. GROUNDING – Always maintain reliable
grounding of the rack and all equipment installed in
the rack.
19. POWER – The power switch in your amplifier is
not all-pole AC switch. You must physically disconnect
AC power cord from either amplifier or AC outlet to
fully disconnect it from AC mains. Make sure you have
access to the power cord if you need to disconnect it in
case of emergency.
20. LIGHTNING – For added protection for this
product during a lightning storm, or when it is left
unattended and unused for long periods of time unplug
it from the wall outlet. This will prevent damage to the
product due to lightning and power-line surges.
21. REPLACEMENT PARTS – When replacement
parts are required, be sure the service technician has
used replacement parts specified by the manufacturer
or have the same characteristics as the original part.
Unauthorized substitutions may result in fire, electric
shock, or other hazards.
22. SAFETY CHECK – Upon completion of any
service or repairs to this product, ask the service
technician to perform safety checks to determine that
the product is in proper operating condition.
IMPORTANT SAFETY PRECAUTIONS
CAUTION: To reduce the risk of electric shock, do not
remove any cover. No user-serviceable parts inside. Refer
servicing to qualified service personnel only.
The lightning flash with arrowhead symbol within the equilateral triangle is intended to alert the use to the
presence of un-insulated “dangerous voltage” within the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock.
The exclamation point within the equilateral triangle is intended to alert the user to the presence of important
operation and maintenance (servicing) instructions in the literature accompanying this appliance.
To prevent electric shock, do not use a polarized plug with an extension cord, receptacle or other outlet unless the blades
can be fully inserted to prevent blade exposure.
CAUTION
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