PB 12 (serv.man14) - JBL Audio User Guide / Operation Manual. Page 2

1. Read Instructions. All the safety and
operating instructions should be read before
the product is operated.

2. Retain Instructions. The safety and 
operating instructions should be retained 
for future reference.

3. Heed Warnings. All warnings on the 
product and in the operating instructions
should be adhered to.

4. Follow Instructions. All operating and use
instructions should be followed.

5. Cleaning. Unplug this product from the
wall outlet before cleaning. Do not use 
liquid cleaners or aerosol cleaners. Use a
damp cloth for cleaning.

6. Attachments. Do not use attachments not
recommended by the product manufacturer,
as they may cause hazards.

7. Water and Moisture. Do not use this
product near water – for example, near a
bathtub, wash bowl, kitchen sink or laundry
tub; in a wet basement; or near a swimming
pool; and the like.

8. Accessories. Do not place this product on
an unstable cart, stand, tripod, bracket, or
table. The product may fall, causing serious
injury to a child or adult, and serious
damage to the product. Use only with a cart,
stand, tripod, bracket, or table recommended
by the manufacturer, or sold with the
product. Any mounting of the product should
follow the manufacturer’s instructions, and
should use a mounting accessory
recommended by the manufacturer.

9. A Product and Cart Combination Should
Be Moved with Care. Quick stops, excessive
force, and uneven surfaces may cause the
product and cart combination to overturn.

10. Ventilation. Slots and openings in the 
cabinet 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 is provided or the manufacturer’s
instructions have been adhered to.

11. Power Sources. This product should be
operated only from the type of power source
indicated on the marking label. If you are 
not sure of the type of power supply to your
home, consult your product dealer or local
power company. For products intended to
operate from battery power, or other
sources, refer to the operating instructions.

12. Grounding or Polarization. This product
may be equipped with a polarized alter-
nating-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.

13. 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 cords at plugs,
convenience receptacles, and the point
where they exit from the product.

14. Nonuse Periods. The power cord of the
product should be unplugged from the outlet
when left unused for long periods of time.

15. Outdoor Antenna Grounding. If an outside
antenna or cable system is connected to the
product, be sure the antenna or cable
system is grounded so as to provide some
protection against voltage surges and built-
up static charges. Article 810 of the National
Electrical Code, ANSI/NFPA 70, provides
information with regard to proper grounding
of the mast and supporting structure,
grounding of the lead-in wire to an antenna
discharge unit, size of grounding conductors,
location of antenna-discharge unit,
connection to grounding electrodes, and
requirements for the grounding electrode.
See Figure A.

16. 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
and disconnect the antenna or cable system.
This will prevent damage to the product due
to lightning and power-line surges.

17. Power Lines. An outside antenna system
should not be located in the vicinity of 
overhead power lines or other electric light
or power circuits, or where it can fall into
such power lines or circuits. When installing
an outside antenna system, extreme care
should be taken to keep from touching such
power lines or circuits, as contact with them
might be fatal.

18. Overloading. Do not overload wall
outlets, extension cords, or integral
convenience receptacles, as this can 
result in a risk of fire or electric shock.

19. Object and Liquid Entry. Never push
objects of any kind into this product through
openings, as they may touch dangerous
voltage points or short-out parts that could
result in a fire or electric shock. Never spill
liquid of any kind on the product.

20. Servicing. 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 service personnel.

21. Damage Requiring Service. Unplug this
product from the wall outlet and refer ser-
vicing to qualified service personnel under 
the following conditions:
a. The power-supply cord or the plug has
been damaged; or
b. Objects have fallen onto, or liquid has
been spilled into, the product; or
c. The product has been exposed to rain or
water; or
d. The product does not operate normally
when following the operating instructions.
Adjust only those controls that are covered
by the operating instructions, as an improper
adjustment of other controls may result in
damage and will often require extensive
work by a qualified technician to restore the
product to its normal operation; or
e. The product has been dropped or
damaged in any way; or
f. The product exhibits a distinct change 
in performance – this indicates a need for
service.

22. Replacement Parts. When replacement
parts are required, be sure the service
technician has used replacement parts
specified by the manufacturer or that have
the same characteristics as the original part.
Unauthorized substitutions may result in fire,
electric shock or other hazards.

23. 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.

24. Wall or Ceiling Mounting. The product
should be mounted to a wall or ceiling only
as recommended by the manufacturer.

25. Heat. The product should be situated
away from heat sources such as radiators,
heat registers, stoves, or other products
(including amplifiers) that produce heat.

CAUTION: To prevent electric shock,

 do not remove the grounding plug 

on the power cord, or use any plug 

or extension cord that does not have 

a grounding plug provided. 

Make certain that the 

AC outlet is properly grounded. 

Do not use an adapter plug 

with this product.

The lightning flash with arrowhead symbol, 
within an equilateral triangle, is intended to 
alert the user to the presence of uninsulated 
“dangerous voltage” within the product’s 

enclosure that may be of sufficient magnitude to constitute a 
risk of electric shock to persons.

The exclamation point within an equilateral 
triangle is intended to alert the user to the 
presence of important operating and 
maintenance (servicing) instructions in the 

literature accompanying the appliance.

Figure A.
Example of Antenna
Grounding as per National
Electrical Code, ANSI/NFPA 70

Part No. JBLULB 10/99

Low-frequency sounds are
normally omnidirectional,
meaning the listener can’t tell

where they are generated
from. However, frequencies
between 75Hz – 150Hz can be
localized, especially at higher
volume levels. Positioning
your subwoofer as recom-
mended will provide the 
most natural soundstage 
and imaging from your
loudspeaker system. 

Remember that these are just
guidelines. Since every
listening room is different, 
JBL strongly 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.

When we designed the 
PB10 and PB12 powered
subwoofers, our goal was 
to offer the user the best
possible performance
combined with the most
flexible and complete
installation options. Please
look over the following three

examples to determine which
description best matches your
system and follow the
corresponding hookup
instructions.

To use the binding-post
speaker terminals with bare
wire, unscrew the collar until
the hole through the center

post is visible under the collar.
Insert the bare end of the wire
through the hole in the post,
then screw the collar back
down until the connection is
tight. The holes in the center
of the collars are intended for
banana-type connectors.

Use this installation method
for Dolby Pro Logic appli-
cations (not Dolby Digital,
DTS

®

or other digital

processing), where the
receiver/processor does not
have a subwoofer output or 
a volume-controlled preamp
(line-) level output:

Connect your receiver or
amplifier’s front left and right
speaker terminals to the left
and right terminals on the
subwoofer that are marked
“High Level In.” Connect the
left and right terminals on the
subwoofer that are marked
“High Level Out” to the cor-
responding terminals on the

back of your front left and
right speakers.  

Connect your receiver or
amplifier’s center, left and
right surround-speaker
terminals to the corre-
sponding terminals on the
back of your center, left and
right surround speakers.