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READ FIRST!
Important Safety Precautions!
13. Unplug this apparatus during
lightning storms or when unused for
long periods of time.
14. Refer all servicing to qualified
service personnel. Servicing is
required when the apparatus has
been damaged in any way, such
as power-supply cord or plug is
damaged, liquid has been spilled
or objects have fallen into the
apparatus, the apparatus has been
exposed to rain or moisture, does
not operate normally, or has been
dropped.
15. Do not use attachments not
recommended by the product
manufacturer, as they may cause
hazards.
16. This product should be operated
1. Read these instructions.
only from the type of power source
2. Keep these instructions.
indicated on the marking label. If
3. Heed all warnings.
you are not sure of the type of
4. Follow all instructions.
power supply to your home, consult
5. Do not use this apparatus near
your product dealer or local power
water.
company. For products intended to
6. Clean only with a dry cloth.
operate from battery power, or other
7. Do not block any ventilation
sources, refer to the operating
openings. Install in accordance with
instructions.
the manufacturer's instructions.
17. If an outside antenna or cable
8. Do not install near any heat
system is connected to the product,
sources such as radiators, heat reg-
be sure the antenna or cable sys-
isters, stoves or other apparatus
tem is grounded so as to provide
(including amplifiers) that produce
some protection against voltage
heat.
surges and built-up static charges.
9. Do not defeat the safety purpose
Article 810 of the National Electrical
of the polarized or grounding-type
Code, ANSI/NFPA 70, provides
plug. A polarized plug has two
information with regard to proper
blades with one wider than the
grounding of the mast and support-
other. A grounding-type plug has
ing structure, grounding of the lead-
two blades and a third grounding
in wire to an antenna discharge
prong. The wide blade or the third
unit, size of grounding conductors,
prong are provided for your safety.
location of antenna-discharge unit,
If the provided plug does not fit into
connection to grounding electrodes,
your outlet, consult an electrician
and requirements for the grounding
for replacement of the obsolete
electrode. See Figure A.
outlet.
18. An outside antenna system
10. Protect the power cord from
should not be located in the vicinity
being walked on or pinched, partic-
of overhead power lines or other
ularly at plugs, convenience recep-
electric light or power circuits, or
tacles and the point where they exit
where it can fall into such power
from the apparatus.
Figure A.
11. Only use attachments/acces-
Example of Antenna Grounding as
sories specified by the manufacturer.
per National Electrical Code,
12. Use only with the cart,
ANSI/NFPA 70
stand, tripod, bracket or
table specified by the
manufacturer or sold
with the apparatus.
When a cart is used, use
caution when moving the cart/appa-
ratus combination to avoid injury
from tip-over.
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lines or circuits. When installing an
outside antenna system, extreme
care should be taken to keep from
touching such power lines or cir-
cuits, as contact with them might
be fatal.
19. Do not overload wall outlets,
extension cords, or integral
convenience receptacles, as this
can result in a risk of fire or
electric shock.
20. Never push objects of any kind
into this product through openings,
as they may touch dangerous volt-
age points or short-out parts that
could result in a fire or electric
shock. Never spill liquid of any kind
on the product.
21. The apparatus shall not be
exposed to dripping or splashing,
and no objects filled with liquids,
such as vases, shall be placed on
the apparatus.
22. Do not attempt to service this
product yourself, as opening or
removing covers may expose you to
dangerous voltage or other hazards.
Refer all servicing to qualified serv-
ice personnel.
23. When replacement parts are
required, be sure the service tech-
nician has used replacement parts
specified by the manufacturer or
that have the same characteristics
as the original part. Unauthorized
substitutions may result in fire, elec-
tric shock or other hazards.
24. Upon completion of any service
or repairs to this product, ask the
service technician to perform safety
checks to determine that the prod-
uct is in proper operating condition.
25. The product should be mounted
to a wall or ceiling only as recom-
mended by the manufacturer.
THANK YOU FOR CHOOSING JBL
For more than 50 years, JBL
provide every note of enjoy-
has been involved in every
ment that you expected – and
aspect of music and film
that when you think about
recording and reproduction,
purchasing additional audio
from live performances to the
equipment for your home, car
recordings you play in your
or office, you will once again
home, car or office.
choose JBL.
We're confident that the JBL
Please take a moment to regis-
system you have chosen will
ter your product on our Web
SPEAKER PLACEMENT
• As a general rule, bass
Low-frequency sounds are nor-
response increases as a
mally omnidirectional, meaning
subwoofer is placed closer
the listener can't tell where they
to a wall. Therefore, bass
are generated from. However,
output is maximized when
frequencies between 75Hz and
the subwoofer is placed in a
150Hz can be localized, espe-
corner.
cially at higher volume levels.
Positioning your subwoofer as
• It is also recommended that
recommended will provide the
the subwoofer be positioned
most natural soundstage and
along the same wall as the
imaging from your loudspeaker
front loudspeakers.
system.
Remember that these are just
guidelines. Since every listening
room is different, JBL strongly
SPEAKER CONNECTION
When we designed the L8400P
then screw the collar back
powered subwoofer, our goal
down until the connection is
was to offer the user the best
tight. The holes in the center
possible performance com-
of the collars are intended for
bined with the most flexible
banana-type connectors. To
and complete installation
comply with European CE
options. Please look over the
certification, these holes are
following three examples to
blocked with plastic inserts at
determine which description
the point of manufacture. To
best matches your system and
use banana-type connectors
follow the corresponding
requires the removal of the
hookup instructions.
inserts. Do not remove these
inserts if you are using the
To use the binding-post
product in an area covered by
speaker terminals with bare
the European CE certification.
wire, unscrew the collar until
the hole through the center
Speakers and electronics
post is visible under the collar.
have corresponding positive
Insert the bare end of the wire
(+) and negative (–) terminals.
through the hole in the post,
It is important to connect both
site at www.jbl.com. This
enables us to keep you posted
on our latest advancements,
and helps us to better under-
stand our customers and build
products that meet their needs
and expectations.
JBL Consumer Products
recommends experimenting
with the positioning of your
subwoofer to obtain the most
pleasing results in your room.
One technique that can help
you find the ideal subwoofer
location is to temporarily place
the subwoofer near the main
listening location. Then move
around the room and determine
where you hear the most
pleasing bass performance.
This would then be the ideal
location for the subwoofer.
speakers identically: positive
(+) on the speaker to positive
(+) on the amplifier and nega-
tive (–) on the speaker to
negative (–) on the amplifier.
Wiring "out of phase" results
in thin sound, weak bass and
a poor stereo image.
With the advent of multichan-
nel surround sound systems,
connecting all of the speakers
in your system with the cor-
rect polarity remains equally
important in order to preserve
the proper ambience and
directionality of the program
material.
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