P1280 - JBL Car Audio User Guide / Operation Manual

p1280 user guide / operation manual
Model
P1280
Pages
4 Few pages! See other manuals at the bottom of the first or last page.
Size
66.88 KB
Type
PDF
Document
User Guide / Operation Manual
Brand
Device
Car Audio
File
p1280.pdf
Date

Read JBL P1280 User Guide / Operation Manual online

Automotive Subwoofers
P 1 0 4 0 ,   P 1 0 8 0 ,   P 1 2 4 0   &   P 1 2 8 0   O w n e r ’s   M a n u a l
G E N U I N E   J B L
P-Series Subs Owner's Manual  6/15/99  10:18 AM  Page 1
02
Thank you
for purchasing a new JBL
Power Series subwoofer. Subwoofer
installation often requires woodworking
skills and some experience disassembling
and reassembling automotive interiors. If
you lack the tools or necessary skills,
have your subwoofer installed by an
authorized JBL dealer. 
Warning: Playing loud music in an auto-
mobile can permanently damage your
hearing as well as hinder your ability to
hear traffic. We recommend listening at
low levels while driving. JBL accepts no
liability for hearing loss, bodily injury or
property damage resulting from use or
misuse of this product.
Choosing an Enclosure
Power Series subwoofers are optimized
to perform best in small sealed, vented
and prefabricated bandpass enclosures.
While infinite-baffle mounting of Power
Series subs is possible, power handling
will be greatly compromised because
there’s no enclosed volume of air to pre-
vent the speaker’s cone from moving past
its limit. For this reason, we do not rec-
ommend infinite-baffle mounting for
Power Series subwoofers.
You should choose the enclosure you will
use based on the type of music you listen
to, how much amplifier power you will
use for the subwoofer and how much
space inside the vehicle you can devote to
a subwoofer enclosure.
Because a sealed enclosure provides the
most control over the woofer’s move-
ment, a woofer mounted in a sealed
enclosure will handle more power than a
woofer mounted in another enclosure
type. Sealed enclosures provide more
accurate sonic reproduction than other
enclosure types, so they are well suited to
all types of music. Sealed-enclosure 
construction is straightforward and there
are many prefabricated sealed enclosures
available. An optimum sealed enclosure
is always smaller than other types of
enclosures optimized for a particular
speaker, so they require the smallest
amount of space inside the vehicle.
Vented enclosures provide better effic i e n c y
in the 40Hz – 50Hz range but this efficiency
comes at the expense of sound in the
lowest octave (below 40Hz) and at the
expense of some control and power han-
dling. If you are using a small amplifier, a
vented box will provide more bass output
from less power. Vented enclosures are
also well suited to a variety of music
types. Because vented enclosures require
the volume of the enclosure and the size
of the port to have a specific relationship
with the characteristics of the woofer, the
enclosure must be built exactly to the
specifications provided. While there are
some prefabricated vented boxes avail-
able, matching a prefabricated box to a
particular woofer is difficult. If you wish to
use a vented enclosure, we strongly rec-
ommend having your authorized JBL
dealer build it or verify that your design is
correct if you wish to build it yourself. An
optimum vented enclosure is always larg-
er than the optimum sealed box for the
same woofer and will require more space
inside the vehicle. 
Bandpass enclosures often provide the
most output available from any amplifier
and subwoofer combination at the
expense of sonic accuracy. If sheer SPL
(sound-pressure level) is what you desire
most, choose a bandpass enclosure.
Bandpass-enclosure design is very tricky
and the aid of a computer and enclosure
design-software is necessary. If you are
an experienced installer or have some
woodworking experience, you may wish
to build the enclosure described in the
enclosure design sheet included with the
woofer. Fortunately, there are many pre-
fabricated bandpass boxes available and
they are all optimized to extract the most
output possible from any woofer.
Bandpass enclosures can be quite large
and may require a lot of space inside your
vehicle.  
P-Series Subs Owner's Manual  6/15/99  10:18 AM  Page 2
3
03
P1040 
P1080 
P1240 
P1280
10" Subwoofer
10" Subwoofer
12" Subwoofer
12" Subwoofer
Recommended Power Amplifier Range 
18W – 300W
18W – 300W 
18W – 325W
18W – 325W
Impedance
4 Ohms
8 Ohms
4 Ohms
8 Ohms
Sensitivity
90dB
90dB
93dB
93dB
Frequency Response
20Hz – 500Hz
20Hz – 500Hz
18Hz – 500Hz
18Hz – 500Hz
Mounting Depth
4-7/8"
4-7/8"
5-3/8"
5-3/8"
Cut-out Diameter
9-1/8"
9-1/8"
11-1/16"
11-1/16"
Specifications
Declaration of Conformity
Kongevejen 194B 
DK-3460 Birkerød
DENMARK
declare in own responsibility, that the products
described in this owner’s manual are in compliance
with technical standards: 
EN 50081-1:1992
EN 50082-1:1992
Steen Michaelsen
Birkerød. DENMARK. 6/99
P-Series Subs Owner's Manual  6/15/99  10:18 AM  Page 3
JBL Consumer Products, 250 Crossways Park Drive, Woodbury, NY 11797
800-336-4JBL (4525)  www.jbl.com  Part No. POWSUBSOM Made in USA
P-Series Subs Owner's Manual  6/15/99  10:18 AM  Page 4
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