Typical Installation Sequence; Power Connections - JL Audio JD 400/4 Owner's Manual

TYPICAL INSTALLATION SEQUENCE

The following represents the sequence
for a typical amplifier installation, using an
aftermarket source unit or OEM Interface
processor (like the JL Audio FiX™ 82 or FiX™ 86).
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 reconnection during
installation. This step is not optional.
2) Run copper 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 the power wire to the positive battery
post. Fuse the wire with an appropriate fuse
block (and connectors) within 18 inches (45
cm) of wire length from the positive battery
post. This fuse is essential to protect the
vehicle. Do not install the fuse until the
power wire has been securely connected to
the amplifier.
4) Run signal cables and remote turn-on wire (if
available) from the source unit or processor to
the final amplifier mounting location.
5) Run speaker cables 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 of the JL Audio ECS master
ground lug, XB-MGLU is recommended). Use
4 AWG copper wire, no longer than 36 inches
(90 cm) from the amplifier 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. A fuse near the
amplifier is not necessary if this is the only
4
device being run from the fused main power
wire. If the fused main power wire is shared
with other amplifiers or devices, fuse each
amplifier/device within 12 inches (30 cm) of
wire length, via a fused distribution block or
multiple individual fuse blocks/on-board fuses.
9) Connect the remote turn-on wire to the
amplifier or configure the "Turn-On Mode"
switch for automatic turn-on.
10) Connect the input cables to the amplifier.
11) Connect the speaker cables to the amplifier.
12) Carefully review the amplifier's control
settings to make sure that they are set
according to the needs of the system.
13) Install the power wire fuse (40A for a
single JD400/4) 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
Voltage" and "Input Sens." controls to obtain
the correct overall output and the desired
system balance. See Appendix A (page 14) for
the recommended input sensitivity
setting method.
16) Enjoy the fruits of your labor with your
favorite music.

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.
JL Audio