P1520e (serv.man9) - JBL Car Audio User Guide / Operation Manual

p1520e (serv.man9) user guide / operation manual
Model
P1520e (serv.man9)
Pages
4 Few pages! See other manuals at the bottom of the first or last page.
Size
486.33 KB
Type
PDF
Document
User Guide / Operation Manual
Brand
Device
Car Audio
File
p1520e-sm9.pdf
Date

Read JBL P1520e (serv.man9) User Guide / Operation Manual online

 
TM
POWER SERIES
Automotive Subwoofer Owner’s Manual 
P1020E
P1220E
P1520E
Thank you for choosing a JBL POWER
subwoofer. POWER subwoofers are
designed to provide maximum sound output
in a variety of enclosure types while
maintaining the superb sound quality
associated with JBL. To ensure the best
subwoofer performance, we strongly
recommend that installation be entrusted to a
qualified professional. Although these
instructions explain how to install a POWER
subwoofer in a general sense, they don’t
show the specific installation procedures that
may be required for your particular vehicle. If
you feel you don’t have the necessary tools
or experience, don’t attempt the installation
yourself; rather, ask your authorized JBL
dealer about professional installation options.
Warning: Playing loud music in an
automobile can hinder your ability to hear
traffic, as well as permanently damage your
hearing. 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.
Your car and bass reproduction
Depending on the size of the vehicle’s
interior listening space, reproduced
frequencies below 80Hz may be boosted by
nearly 12dB per octave as frequency
decreases. This effect, commonly know as
transfer function or cabin gain, plays an
important role in defining the in-car
frequency response of your subwoofer.
Power handling Limitations
The power handling capacity of any
subwoofer is related to the excursion limit of
its suspension and its ability to dissipate heat.
A speaker reaches its excursion-limited
power-handling capacity when its suspension
is stretched to its limit.
Thermal power handling is determined by the
amount of heat that may be dissipated by the
driver’s voice coil. The power-handling rating
assigned to your POWER subwoofer is its
thermal-power-handling rating. This rating
assumes a clean (unclipped) signal. A clipped
waveform has much higher average power,
due to the longer duty cycle at the top and
bottom of the waveform; it will heat the
woofer’s voice coil faster than a clean signal
and may damage the voice coil. A square
wave has a 100% duty cycle and is
extremely dangerous for any speaker.
Audible distortion in the output of your
woofer is an indication that your amplifier
may be clipping, which could damage your
speakers over time.
Choosing an enclosure
POWER subwoofers are optimized to
perform best in sealed and vented
enclosures. While infinite-baffle mounting of
POWER subs is possible, power handling will
be compromised since there will be no
enclosed volume of air to help the speaker’s
suspension control the motion of the
woofer’s cone. For this reason, we do not
recommend infinite-baffle mounting for high
power applications.
You should choose the enclosure you’ll use
based on the type of music you listen to, how
much amplifier power you’ll use to drive
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 movement, a
woofer mounted in a sealed enclosure will
handle more power at low frequencies 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 type of
music. Sealed-enclosure construction is
straightforward. An optimum sealed
enclosure is always smaller than other types
of enclosure that are optimized for a
particular speaker, so they require the least
space inside the vehicle.
02
The Official Brand of Live Music
Vented enclosures provide better
efficiency in the 40Hz – 60Hz range, but this
efficiency comes at the expense of sound
output in the lowest octave (below 40Hz)
and at the expense of some control and
power handling below box tuning. 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 exactly
to the specifications provided. If you wish to
use a vented enclosure, we strongly
recommend 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 larger
than the optimum sealed box for the same
woofer, and will require more space inside
the vehicle.
Bandpass enclosures can provide the
greatest 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 vented or bandpass enclosure.
Bandpass enclosure design is very tricky and
the aid of a computer and enclosure design
software is necessary if you wish to design
the enclosure yourself. Like a vented
enclosure, a bandpass enclosure must be
built exactly to the specifications. Bandpass
enclosures can be quite large and may
require a lot of space inside your vehicle.
Enclosure construction
Please observe the following suggestions
when building an enclosure for POWER
subwoofers.
1. Choose an enclosure design from the
enclosure design Sheet included with your
subwoofer.
2. Use at least 19mm (3/4") MDF(Medium
Density Fiberboard) or marine birch
plywood to build the enclosure. Enclosure
for 30cm (12") and larger subwoofers and
smaller woofers driven by high-power
amplifiers should be constructed using
25mm (1") material
3. Join pieces of wood with glue and screws;
do not use nails. Once the box has been
tested, seal all joints inside the box with
silicone caulk.
4. Fill the enclosure with damping material
(dacron, fibreglass insulation or long-fiber
wool).
5. Use PVC or ABS plastic for ports. Keep in
mind that the openings at either end of the
port must be at least one port diameter
away from any obstruction.
6. Mount the woofer on the baffle and screw
it down tightly for an air-tight seal.
DECLARATION OF CONFORMITY
We, Harman Consumer International 
2, route de Tours
72500 Château-du-Loir
France
Emmanuel Millot
Harman Consumer International 
Château-du-Loir, France  01/02
declare in own responsibility, that the products 
described in this owner’s manual are in compliance 
with technical standards:
EN 50081-1:1992
EN 50082-1:1997
03
 
TM
POWER SERIES
Harman consumer International
2, route de Tours, 72500 Château-du-Loir, france  www.jbl.com
©2001 JBL, Incorporated • JBL is a registered trademark of JBL, Incorporated 
Part No. POWER 10-12E OM 01/02
Specifications
P1020E
P1220E
P1520E
10" (25cm) Woofer
12" (30cm) Woofer
15" (38cm) Woofer
Power Handling (peak) 1600W
1600W
1600W
Power Handling (RMS) 400W
400W
400W
Frequency Response
25Hz – 500Hz
20Hz – 400Hz
18Hz – 400Hz
Nominal Impedance
4 Ohms
4 Ohms
4 Ohms
Sensitivity (2.83V/1m)
89dB
91dB
91dB
Voice Coil Diameter
76.2mm
76.2mm
76.2mm
Cut-Out Diameter
234mm
280mm
353mm
Mounting Depth
153mm
172mm
172mm
Thiele and Small Parameters
Revc
3.95
3.98
3.81
Levc
1.93
1.86
1.54
Sd (cm
2
)
314
482
780
BL
14.14
15.88
16.84
Vas (Liters)
32
51
135.94
Cms (mm/N)
0.21
0.17
156.44
Mms (grams)
145
182
250.51
Fs (Hz)
30
28.5
25.38
Qms
6
4.08
7.20
Qes
0.5
0.49
0.54
Qts
0.45
0.44
0.5
Xmax (MM)
15.90
15.90
15.90
Xmax (In)
0.63
0.63
0.63
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Here you can read online and download JBL P1520e (serv.man9) User Guide / Operation Manual in PDF. P1520e (serv.man9) user guide / operation manual will guide through the process and help you recover, restore, fix, disassemble and repair JBL P1520e (serv.man9) Car Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.