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JL Audio JX400 Manual

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JX400/4D 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 body during installation.
+12 VDC Ground
Remote
CH. 3
(
L
)
CH. 4
(
R
)
CH. 1
(
L
)
CH. 2
(
R
)
BridgedBridged
The JX400/4D’s “+12VDC” and “Ground”
connections are designed to accept 4 AWG
power wire. 4 AWG copper wire is a minimum
power wire size for this amplifier. We do
not recommend the use of "Copper-Clad
Aluminum", or "CCA" wire.
If you are installing the JX400/4D with other
amplifiers and wish to use a single main power
wire, use 2 AWG, or larger, copper main power
wire (depending on the overall current demands
of all the amplifiers in the system). This 2 AWG
or larger power wire should terminate into a
fused distribution block mounted as close to the
amplifiers as possible and should connect to the
JX400/4D with 4 AWG copper power wire.
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.).
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 the appropriate terminal block
positions on the JX400/4D. 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 copper wire 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 copper wire when installing
amplifier systems with main fuse ratings above
60A.
FUSE REQUIREMENTS
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
JX400/4D is the only device connected to this
main wire, use a 40A AGU or MAXI® fuse (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.
… 5 …


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