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4 JL Audio JX250/1 • JX500/1D • JX1000/1D 5
ENGLISH
POWER CONNECTIONS
Before installing the amplifier, disconnect the
negative (ground) wire from the vehicle’s battery.
This will prevent accidental damage to the system,
the vehicle and your person during installation.
The amplifier’s “+12 VDC” (positive) and
Ground” (ground) connections are designed to
accept up to 4 AWG power wire.
Minimum Power / Ground
Wire Size Requirements:
JX250/1: 8 AWG
JX500/1D: 4 AWG
JX1000/1D: 4 AWG
Note: Smaller AWG numbers mean bigger wire
and vice-versa (1/0 AWG is the largest, 2 AWG is
smaller, then 4 AWG, then 8 AWG, etc.).
The above wire gauge recommendations
assume no other amplifiers are connected
to the same wire. Use larger wire with
a fused distribution block (or separate
wires) for multiple amplifiers.
If you are installing this amplifier with other
amplifiers and wish to use a single main power
wire, use 2 AWG or 1/0 AWG main power wire
(depending on the overall current demands of
all the amplifiers in the system). This 2 AWG
or 1/0 AWG power wire should terminate into a
fused distribution block mounted as close to the
amplifiers as possible and should connect to the
JX monoblock with 4 AWG power wire (8 AWG is
sufficient for the JX250/1 only).
To connect the power and ground wires
to the amplifier, strip 1/2-inch (12 mm) of
insulation from each wire and insert the
bare wire into the appropriate terminal block
positions on the JX250/1. Use the supplied
2.5 mm hex wrench to secure the wire via
the screw on the top of each terminal.
The Ground connection should be made
using 4 AWG wire (8 AWG is sufficient for
JX250/1 only) and should be kept as short as
possible, while accessing a solid piece of sheet
metal in the vehicle. The surface of the sheet
metal should be sanded at the contact point
to create a clean, metal-to-metal connection
between the chassis and the termination of the
ground wire. The use of a #10 sheet metal screw
and star washer to lock down the connection is
advisable. Alternatively, you can use a specialized
grounding lug, such as the JL Audio XB-MGLU.
Any wires run through metal barriers (such
as firewalls), must be protected with a high
quality insulating grommet to prevent damage
to the insulation of the wire. Failure to do so
may result in a dangerous short circuit.
IMPORTANT!
!
Many vehicles employ small (10 AWG -
6 AWG) wire to ground the battery to the
vehicle chassis and to connect the alternator’s
positive connection to the battery. To prevent
voltage drops, these wires should be upgraded
to 4 AWG when installing amplifier systems
with main fuse ratings above 60A.
FUSE REQUIREMENTS
JX250/1: 30A (AGU or MAXI®)
JX500/1D: 50A (AGU or MAXI®)
JX1000/1D: 80A (AGU, ANL or MAXI®)
An appropriate fuse at the main power wire(s)
to the amplifier(s) is vital for vehicle safety! This
fuse must be installed within 18 inches (45 cm)
of the positive battery post connection. If the JX
monoblock is the only device connected to this
main wire, use the corresponding fuse value listed
above (no other fuse is required in this situation).
When running multiple devices from one
main power wire, the main fuse value and rating
of the main power wire must be high enough
for all of the equipment being run from it. Use a
fused distribution block to split the main power
wire feed to each device, with appropriate fusing
and power wire for each device.
PRODUCT DESCRIPTION
JL Audio JX monoblock subwoofer
amplifiers are specifically designed to drive
subwoofers. Their frequency response is
limited to the range below 150 Hz., making
them unsuitable for driving midrange speakers
or tweeters. For detailed specifications,
please refer to Appendix B (page 13).
TYPICAL INSTALLATION SEQUENCE
The following represents the sequence
for a typical amplifier installation, using an
aftermarket source unit or OEM Interface
product. Additional steps and different
procedures may be required in some applications.
If you have any questions, please contact your
authorized JL Audio dealer for assistance.
1) Disconnect the negative battery post
connection and secure the disconnected cable
to prevent accidental re-connection during
installation. This step is not optional!
2) Run power wire from the battery location
to the amplifier mounting location,
taking care to route it in such a way
that it will not be damaged and will not
interfere with vehicle operation. See
next page for appropriate wire size.
3) Connect power wire to the positive battery
post. Fuse the wire with an appropriate fuse
block (and connectors) within 18 inches (45
cm) wire length of the positive battery post.
This fuse is essential to protect the vehicle.
Do not install the fuse until the power wire
has been connected to the amplifier.
4) Run signal cables (RCA cables) and remote
turn-on wire from the source unit to the
amplifier mounting location.
5) Run speaker wire from the speaker systems
to the amplifier mounting location.
6) Find a good, solid metal grounding point
close to the amplifier and connect the
negative power wire to it using appropriate
hardware. Use the same size power wire
used for the +12V connection, no longer
than 36 inches (90 cm) from the amplifier's
ground (GND) connector to the ground
connection point. In some vehicles, it may
be necessary to upgrade the battery ground
wire. (See page 5 for important notice).
7) Securely mount the amplifier using
appropriate hardware.
8) Connect the positive and negative power
wires to the amplifier.
9) Connect the remote turn-on wire
to the amplifier.
10) Connect the input cables
to the amplifier.
11) Connect the speaker wires to the amplifier.
12) Carefully review the amplifiers control
settings to make sure that they are set
according to the needs of the system.
13) Install power wire fuse (see next page for
correct value) and reconnect the negative
battery post terminal.
14) Turn on the source unit at a low level
to double-check that the amplifier is
configured correctly. Resist the temptation to
crank it up until you have verified the control
settings.
15) Make necessary adjustments to the input
sensitivity controls to obtain the right
overall output and the desired balance
in the system. See Appendix A (page 12)
for the recommended input sensitivity
setting method.
16) Enjoy the fruits of your labor with your
favorite music.
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