DOWNLOAD JBL P800 Service Manual ↓ Size: 157.73 KB | Pages: 8 in PDF or view online for FREE

Model
P800
Pages
8
Size
157.73 KB
Type
PDF
Document
User Manual / Operation Manual
Brand
Device
Car Audio
File
p800.pdf
Date

JBL P800 User Manual / Operation Manual ▷ View online

G R A N D   T O U R I N G   S E R I E S
G E N U I N E   J B L
A u t o m o t i v e  
S u b w o o f e r s
P - 8 0 0 ,   P - 10 0 0 ,   P - 12 0 0 ,   P - 15 0 0   O w n e r ’ s   M a n u a l
P800, P1000, P1200, P1500 – OM  7/14/98 3:40 PM  Page 1
JBL Power Series
Features
The JBL Power Series consists 
of serious subwoofers that are
unlike any others in their class.
They will deliver unparalleled
performance in a wide variety 
of enclosures, giving creative
installers unprecedented flexi-
bility in system design.
The JBL Power Series incorpo-
rates:
• Injection-molded Titanium
composite cones for optimum
combination of stiffness and low
mass
• Butyl rubber surround for
lower harmonic distortion and
precise voice-coil travel
• Dual-stacked magnets and 
X-Linear™ motor assembly
for controlled, long-throw 
cone excursion
02
A Few Words 
About Enclosures
The enclosure or box that you
choose for your Power Series
woofer will define the sound that
will ultimately come out of it.
The size of the box and tuning
frequency of port tubes in vented
enclosures dictate the low-
frequency performance and 
output capability of your system.
The flexibility designed into the
Power Series subwoofers lets
them make tons of bass in small
sealed, vented and bandpass
enclosures. They will also work
well in infinite baffle applications
where there is no space or budget
to build a box. Be aware that infi-
nite baffle or ”free air“ mounting
will reduce the power handling
Thank you
for choosing this
JBL Power Series subwoofer. The
Power Series of automotive sub-
woofers is designed to be used in
modern car audio systems to
produce extended, powerful bass in
a limited amount of space. Power
Series subwoofers are designed to
suit a broad range of applications
and can be used in a wide variety
of enclosure types. In order to
maximize the performance poten-
tial of these subwoofers, it is rec-
ommended that installation be left
to a qualified professional. If you
feel you have the ability to prop-
erly build an enclosure and install
the subwoofer yourself, the infor-
mation in this manual will help you
get it right.
Keep your sales receipt with this
manual in a safe place so both are
available for future reference.
• Deepbeat™ anti-resonance
chassis coating on the basket to
prevent audible ringing
• Thermosink™ motor assembly
coating to dissipate heat and
increase power handling
• Unique 5-ohm nominal imped-
ance for extreme flexibility in
installations with multiple sub-
woofers
The JBL Power Series woofers
are designed to maximize the
sonic potential of any system.
When installed in a proper enclo-
sure they offer smooth frequency
response, excellent transient
response, high-output efficiency,
and high-power handling capa-bil-
ity. The result is powerful,
dynamic and accurate sound
reproduction that could only
come from JBL.
P800, P1000, P1200, P1500 – OM  7/14/98 3:40 PM  Page 2
03
Enclosure Calculation and
Building
Recommended box designs 
are available from your JBL
Dealer, or at www.jbl.com on the
Internet. You may choose cabinet
dimensions to fit your car, but the
internal volume must not be
changed, since changes in inter-
nal volume will change the tuning
frequency of the enclosure.
Please contact your authorized
JBL dealer if you cannot do 
the necessary calculations your-
self. The JBL Speakershop™ 
dedicated enclosure-design soft-
ware program may also be helpful
for experienced car-audio 
enthusiasts.
Your Car And 
The BASS Made In It
Depending on the size of the vehi-
cle, bass frequencies below 50Hz
or 80Hz are actually boosted by
nearly 12dB per octave as the
frequency decreases. If you
wanted to purchase that kind of
power, you would need an ampli-
fier that was eight times more
powerful than the one you have.
You can either reduce bass level
to compensate for this, or simply
sit back and enjoy the “free”
bass.
Sealed enclosures exert the most
control over the motion of a sub-
woofer because the air acts like a
spring against the motion of the
woofer cone. Larger boxes allow
for more excursion, thus more
sound output for the amount of
power used. When placed in a
sealed box larger than the rated
compliance (Vas) of the sub-
woofer, it will react as if it were
in an infinite baffle installation.
Vented and bandpass enclosures
have the lowest amount of excur-
sion for the amount of sound out-
put. This is a result of port tuning
reinforcing the sound output.
Vented boxes will not provide
adequate woofer control when
driven below the port tuning
range, meaning proper design is
important. A fourth-order band-
pass box will have the lowest
and the low-frequency response
of a subwoofer. Finally, although
information is available for
Bandpass enclosures from your
JBL Dealer, any variations from
the recommended dimensions
should be made using dedicated
enclosure-design software such as
JBL Speakershop™. 
If this type of software is not
available, assistance is available
through JBL‘s Web site at
www.jbl.com or from your autho-
rized JBL dealer.
P800, P1000, P1200, P1500 – OM  7/14/98 3:40 PM  Page 3
04
3. All joints should be glued and
screwed; do not use nails.
”Deck“ or ”Zip“ screws are rec-
ommended since they have
coarse threads for better grip
and don‘t require pre-drilling
holes. Once the box has been test-
ed, it should be sealed with caulk
around all interior joints.
4. Apply a 1" thick sheet of poly-
fill (available at fabric and craft
stores) to all inside walls except
the wall where the subwoofer is
mounted. If this is not done,
increase the recommended box
volume by 10 percent.
5. Use PVC or ABS pipe (card-
board tubing is acceptable if the
walls are over 1/16" thick). Keep
in mind the openings at either
end of the port must be at least
one port diameter away from any
obstructions inside or outside of
the box. Minimum recommended
port size is as follows:
8" Subwoofer – 2"
10" Subwoofer – 3"
12" Subwoofer – 3"
15" Subwoofer – 4"
Tools you will need:
• Straight-edge
• Saw (circular or table)
• Screwdriver (powered or
screwdriver bits in a variable-
speed drill are best)
• Sabre saw or keyhole saw 
(to cut hole for woofer)
• Measuring tape
• Soldering iron and solder
• Wire cutters/strippers
• Utility knife (to cut carpet)
• Pencil
Materials:
•  3/4" or thicker MDF
• Caulk
• PVC or ABS pipe
• Deck screws
• Carpet
• Carpet Adhesive 
(aerosol-type works well)
• Speaker wire (12 or 16 gauge
for woofers)
Take your time and mark the
wood carefully before making
any cuts. The old adage ”mea-
sure twice and cut once“ definitely
applies here. Use the straight-
edge to make sure your lines are
straight, and clamp it to the wood
to use it for guiding the saw if
you are using a circular saw.
This will get you the straightest
edges, the best fit and the best
sound.
overall cone excursion at the
expense of limited bandwidth.
1. Dimensions: Whenever possi-
ble, try not to make a box that
has dimensions that are equal to,
or multiples of, each other. For
example, a 10" x 10" x 20" box
would be susceptible to standing
waves that may cancel some fre-
quencies and add to cabinet reso-
nance. A better alternative would
be 18" x 11" x 10".
2. It is recommended that 3/4"
(19mm) MDF be used to build the
enclosure. Particle board is
acceptable, but it is more difficult
to work with. Enclosures for 12"
and larger subwoofers, or small
subwoofers, driven by high power
amplifiers should be constructed
out of 1" (25mm) material.
P800, P1000, P1200, P1500 – OM  7/14/98 3:40 PM  Page 4
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JBL P800 User Manual / Operation Manual ▷ Download

  • DOWNLOAD JBL P800 Service Manual ↓ Size: 157.73 KB | Pages: 8 in PDF or view online for FREE
  • Here you can View online or download the User Manual / Operation Manual for the JBL P800 in PDF for free, which will help you to disassemble, recover, fix and repair JBL P800 Car Audio. Information contained in JBL P800 User Manual / Operation Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.