Page 1
THANK YOU
for choosing the JBL BassPro™II.
BassPro II has been designed to
deliver great bass performance from
a compact, easily installed powered
subwoofer enclosure.
To get the best performance from your
BassPro II, we strongly recommend
that installation be entrusted to a
qualified professional. Although these
instructions explain how to install
BassPro II in a general sense, they
do not show specific installation
methods that may be required for your
particular vehicle. If you do not have
the necessary tools or experience, do
not attempt the installation yourself.
Instead, please ask your authorized
JBL car audio dealer about professional installation.
In order that we may better serve you
should you require warranty service,
please retain your original sales
receipt and register your BassPro II
online at www.jbl.com.
Page 2
INSTALLATION
WARNING: Playing loud music in
an automobile can hinder your ability
to hear traffic and permanently damage your hearing. We recommend
listening at low or moderate levels
while driving your car. JBL accepts
no liability for hearing loss, bodily
injury or property damage resulting
from the use or misuse of this product.
INSTALLATION
WARNINGS AND TIPS:
• Always wear protective eyewear
when using tools.
• Disconnect the vehicle’s negative (–)
battery terminal before starting the
installation.
• Check clearances on both sides of
a planned mounting surface. Be
sure that screws or wires will not
puncture brake lines, fuel lines or
wiring harnesses, and that wire
routing will not interfere with the safe
operation of the vehicle.
• When making electrical connections,
make sure they are secure and
properly insulated.
• If BassProII’s fuse must be replaced,
be sure to use the same type of fuse
and current rating as that of the
original.
CHOOSING A MOUNTING
LOCATION FOR
BASSPRO II:
Choose a mounting location that
doesn’t interfere with cargo, the folddown rear seat or the trunk lid. The
best location is usually a corner of
the trunk or cargo area, as shown
in
Figures 1 and 2.
Securely mount BassProII to the
mounting surface using the four
enclosed self-tapping screws.
Choose a mounting location in the
front of the vehicle for the remote
level control.
Figure 1.
Figure 2.
Figure 3.
Bottom view of BassProII.
2
Page 3
INSTALLING THE REMOTE
CONNECTING THE SUBWOOFER
LEVEL CONTROL TO BASSPRO II
The Subwoofer Level Control may be
mounted under the dash or dismantled
and mounted in the dash for a factoryinstalled appearance.
UNDER-DASH MOUNTING
Select a mounting location that allows
easy access to the control while driving. Using the Subwoofer Level Control
as a template, mark and drill holes in
the mounting surface. Attach the
Subwoofer Level Control using the
mounting screws provided (Figure 4).
IN-DASH MOUNTING
Disassemble the Subwoofer Level
Control by removing the two Phillipshead screws on the front panel,
rear panel and on top. Remove the
Subwoofer Level Control’s bottom and
side panels. Slide the Subwoofer Level
Control’s PC board forward to release
the RJ11 connector from the back
panel and remove the board along with
the potentiometer, knob and connector
as a single assembly.
Choose a mounting location that
allows easy access to the control,
and provides 1-3/4" clearance behind
the mounting surface. Drill a 9/32"
hole in the mounting surface. Feed
the Subwoofer Level Control’s
potentiometer shaft (with the knob
removed) through the hole and use the
nut and washer provided to hold the
control in place (Figure 5).
Route the cable behind the dash or
other interior panels and under the
carpet. Do not route the cable outside
the vehicle. Connect the RJ11 cable
between the RJ11 receptacle on the
BassProII and the receptacle on the
Subwoofer Level Control (Figure 6).
Socket
for
Control
Cable
Level
Control
Circuit
Board
Washer
Hex Nut
Knob
Figure 4. Under-dash mounting of the
Subwoofer Level Control.
Figure 5. In-dash mounting of the Subwoofer Level Control.
Figure 6. Subwoofer Level Control electrical
connection.
Knob
Hex Nut
Washer
Level-
Control
Circuit
Board
Socket
for
Control
Cable
BassProII Connection Panel
Control
Cable
Rear View of
Level-Control
Circuit Board
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Page 4
POWER CONNECTIONS
Connecting power to BassProII is
shown in Figure 7. Please observe
the following installation tips:
When using the high-level input connections, BassProII will automatically
turn on when you turn on your radio.
In this case, the remote (REM) connection is not needed. Use at least #20
AWG speaker wire for speaker-level
input connections.
Use at least #12 AWG wire for the
Positive Battery (BATT+12) and Ground
() connections. If needed, use at
least #20 AWG wire for the remote
(REM) turn-on connection.
Connect BassProII’s “BATT +12V”
terminal directly to the battery’s positive (+) terminal. Install a fuse holder,
with a 20A fuse, within 18" of the battery’s positive (+) terminal.
BassPro
(right-side panel)
Chassis Ground
(Bare Metal)
Source Unit
Battery
Fuse 20 A
18"
Remote
Turn-On
Route all power wires through a grommet in the vehicle’s firewall. If a factory
grommet is not available, install one.
Connect a short ground wire from
BassProII’s ground terminal ( ) to the
nearest bare metal surface. For a good
connection, use sandpaper to clear
paint from the metal surface and use
a screw with a lock (star) washer.
The remote (REM) connection requires
a +5 to +12 Vdc signal for BassProII
to turn on when using the line-level
connections. Most head units with
preamp outputs provide this remote
voltage signal. As an alternative,
connect this terminal to a switched
ignition circuit.
Figure 7.
Chassis Ground
(Bare Metal)
Battery
Source Unit
Remote
Turn-On
Fuse 20A
18"
BassProII Connection Panel
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APPLICATIONS
BassProII is equipped with two linelevel (RCA) inputs and two high-level
inputs. To help you plan the installation
of BassProII, we have included two
system application diagrams in
Figures 8 and 9. For more installation
suggestions, contact your local
authorized JBL car audio dealer.
Splices
(not supplied)
Splices
(not supplied)
Figure 9. Line-level connections
with two outputs (single full-range
or subwoofer).
Figure 8. High-level connections.
Connect BassProII’s high-level
inputs to either the front or rear
speaker outputs of your head unit
(splice crimps not included).
BassProII
Connection Panel
Subwoofer Level Control
BassProII
Connection Panel
Subwoofer Level Control
Left Speaker
Right Speaker
Source Unit
Source Unit
LF Speaker
RF Speaker
LR Speaker RR Speaker
RCA Stereo Cables
(not supplied)
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Page 6
CONTROLS AND FUNCTIONS
BassProII has controls and indicators
that help simplify sonic integration with
almost any vehicle’s unique acoustic
properties. These controls are located
on the amplifier panel, as shown in
Figure 10.
Power LED
Gain Control
Crossover
Remote Bass Control
Auto Turn-On
POWER LED: This indicator
will glow red when the BassProII
is operating.
GAIN CONTROL: Use this
control to adjust the relative volume
(loudness) of BassProII with the other
speakers in the vehicle.
CROSSOVER: Use this control
to adjust the amount of high-frequency
information present in BassProII’s output. A lower value signifies less highfrequency content.
3. Turn the head unit ON and play a
selection of your favorite music
track that has substantial bass.
4. Adjust the CROSSOVER control
counterclockwise, until you hear
only low-frequency information.
Example – you should not hear
vocals coming from BassProII
when seated in the normal listening
position.
5. Adjust the BASS CONTROL either
clockwise or counterclockwise to
suit your taste, and to avoid audible
distortion.
6. If you elect not to install the Remote
Bass Control, adjust the GAIN
control to the maximum level that
provides undistorted output from
the BassProII, with the head unit’s
volume control at its 3 o’clock
setting.
NOTE: In most cases the above steps
will provide you with satisfactory
results. However, the actual process
may require several readjustments of
each control, since the settings will
interact with one another. If necessary,
consult your authorized JBL car audio
dealer for help in tuning your system.
AUTO TURN-ON: For speakerlevel connections, used this switch to
activate (or deactivate) BassProII’s
automatic turn-on circuit. For most
speaker-level applications, slide the
switch to the AUTO position. If you
prefer to use the remote (REM)
connection, slide the switch to the
OFF position.
REMOTE BASS
CONTROL: Use this RJ-11 jack
to connect the supplied remote bass
control.
SETTING THE CONTROLS:
1. Make sure the head unit is off and
VOLUME control is set to minimum.
2. On BassProII’s amplifier panel, set
the CROSSOVER to its maximum
frequency of 120Hz, as shown in
Figure 10.
NOTE: If using the REMOTE BASS
CONTROL, set GAIN to maximum
and set the BASS CONTROL to the
midpoint.
6
Figure 10.
Page 7
TROUBLESHOOTING
PROBLEM CAUSES AND SOLUTIONS
POWER LED is not lit. 1. Fuse is blown and needs
replacement.
2. Head unit not functioning properly.
3. Check remote turn-on, power and
ground connections.
POWER LED is lit but there is no bass. 1. Inputs are not connected. Check
connections.
2. Head-unit fader controls are not set
properly. Adjust head-unit controls to
feed audio signals to BassProII.
3. Incorrect GAIN control setting.
Output sounds muddy or distorted. 1. GAIN is set too high.
2. Bass level is set too high on
head unit.
3. Head unit output is distorted or
blown. See your authorized JBL car
audio dealer.
Output gets louder when the head-unit Using speaker-level connection: one of
balance is adjusted to L or R. the speaker connections is reversed
(+/–). Reverse one channel.
POWER LED remains ON after system Speaker-level connections have a fiveis turned off. minute turn-off delay. Check the unit at
a later time.
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Page 8
Amplifier power: 100 Watts
Frequency response: 20Hz – 120Hz
Fuse rating: 20A
Max current draw: 12A
Idle current draw: <800mA
Input sensitivity: 50mV to 4V Line-level input;
1V to 16V universal interface
Crossover frequency: 70Hz – 120Hz
Crossover slope: 12dB
Dimensions (L x W x H): 16-1/8" x 9-1/2" x 12-1/4"
(includes mounting feet) (410mm x 242mm x 312mm)
Features, specifications and appearance are subject to change without notice.
SPECIFICATIONS
Declaration of Conformity
We, Harman Consumer International
2, route de Tours
72500 Chateau-du-Loir
France
declare in own responsibility that the product
described in this owner’s manual is in compliance
with technical standards:
EN 55013:2001
EN 55020:2002
Emmanuel Millot
Harman Consumer International
Chateau-du-Loir, France 3/04
JBL Consumer Products
250 Crossways Park Drive, Woodbury, NY 11797 USA
516.255.4JBL (4525) • FAX 516.682.3523 • www.jbl.com
© 2004 Harman International Industries, Incorporated
JBL is a registered trademark, and BassPro is a trademark,
of Harman International Industries, Incorporated.
Part No. BASSPROIIOM3/04
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