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JL Audio HD600/4 User Manual

Page 4

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6 | JL Audio - HD600/4 Owner’s Manual

7

ground Connection

The chassis ground connection must be

made using 4 AWG or 8 AWG pure 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 with a brass or copper power ring. For
optimal grounding, we recommend the
use of a JL Audio ECS master ground lug
(XB-MGLU). Alternatively, a sheet metal
screw or bolt can be used with a star washer.

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 pure copper wire when installing amplifier

systems with main fuse ratings above 60A.

turn-on wire

The HD600/4 uses a conventional +12V remote

turn-on wire, typically controlled by the source
unit’s remote turn-on output. The amplifier will
turn on when +12V is present at its “Remote”
input and turn off when +12V is switched off. If
a source unit does not have a dedicated remote
turn-on output, the amplifier’s turn-on lead can
be connected to +12V via a switch that derives
power from an ignition-switched circuit.

The HD600/4’s “Remote” turn-on connector

is designed to accept 18 AWG – 12 AWG wire. 18
AWG is more than adequate for this purpose.
To connect the remote turn-on wire to the
amplifier, first back out the set screw on the
bottom of the Power Connector Plug, using the
supplied hex wrench. Strip 1/2 inch (12mm) of
wire and insert the bare wire into the receptacle,
seating it firmly so that no bare wire is exposed.
When using smaller wire, it may be necessary to
strip 1 inch of insulation from the wire and fold
the bare wire in half prior to insertion. While
holding the wire in the terminal, tighten the
set screw firmly using the supplied 2.5 mm hex
wrench, taking care not to strip the head of the
screw and making sure that the wire is firmly
gripped by the set screw.

amplifier Power Connector Plug

To connect the power wires and the remote

turn-on wire to the amplifier, unplug the power
connector plug from the amplifier chassis (pull
back firmly) and back out the set screws on
the connector plug, using the supplied 4 mm
hex wrench for the +12 VDC” and “Ground”
connections and the supplied 2.5 mm hex wrench
for the “Remote” connection. Strip 3/8 inch (10
mm) of insulation from the end of each wire and
insert the bare wire into the receptacle on power
connector plug, seating it firmly so that no bare
wire is exposed. While holding each wire in place,
tighten each set screw firmly, taking care not to
strip the head of the screw.

Never make power connections with a “live”

wire. Always disconnect the negative battery

post before making any connections or

adjustments to a 12V power connection!

Power and turn-on 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.

Rear

Preouts

Remote

Level

Control

Front

Inputs

L

R

L

R

+12 VDC Ground Remote

+12V battery Connection

You will need to connect a power wire to

the vehicle’s positive battery terminal, using an
appropriate power ring or specialized battery
terminal connector, such as the JL Audio
XB-BTU. This connection must be tight and
corrosion-free to ensure proper connectivity. This
wire MUST be fused appropriately for safety. Any
positive power 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.

Power wire requirements

The HD600/4’s “+12 VDC” and “Ground”

connections are designed to accept 4 AWG power
wire. 4 AWG pure copper wire is recommended
for any power wire run longer than 72 inches (180
cm). For runs shorter than 72 inches, 8 AWG pure
copper power wire is acceptable.

If you are installing the HD600/4 with other

amplifiers and wish to use a single main power
wire, use 2 AWG or 1/0 AWG pure copper wire
as a main power wire. This 2 AWG or 1/0 AWG
power wire should terminate into a distribution
block mounted as close to the amplifiers as
possible and should connect to the HD600/4 with
4 AWG or 8 AWG pure copper power wire.

Please note that lower 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.).

We do not recommend the use of “copper-

clad aluminum wire” or “CCA” wire because

this wire is significantly less conductive than

pure copper wire. Only use pure copper power

wire, such as JL Audio’s MetaWire™. Tinned

copper wire (silver color) is acceptable as the

tin-plating is only a very minor component of

the wire.

Fuse requirements

The installation of a fuse on the main power

wire, within 18 wire inches (45 cm) of the positive
battery terminal is vital to protect the wire and
the vehicle from fire in the event of a collision
or short-circuit. The fuse value at each power
wire should be just high enough for all of the
equipment being run from that power wire. Do
not use a fuse with a value that far exceeds the
total fuse rating of the electronics connected to
the wire.

If only the HD600/4 is being run from that

power wire, we recommend a 50A fuse be used.
AGU (big glass fuse). AFS (small blade fuse)
or MaxiFuse™ (big plastic-body fuse) types are
recommended. If other amplifiers are also being
powered from the wire and exceed 80 amps in
total fuse rating, we recommend the use of an
ANL (large-blade) fuse and holder. Please consult
with your JL Audio dealer to make sure that the
wire, fuse holder and fuse rating you have selected
are appropriate for your system’s needs.

If other amplifiers are also being powered from

a main power wire and exceed 80 amps in total
fuse rating, we recommend the use of an ANL
(large-blade) fuse and holder. Each amplifier can
then be fused independently at the outputs of
the power distribution block. Use JL Audio part
XC-FOA-2PAK and appropriate MaxiFuse™ type
fuses with JL Audio distribution blocks.

Please consult with your JL Audio

dealer to make sure that the wire, fuse
holder and fuse ratings are appropriate
for your system’s needs. The safety of
your installation depends on appropriate
power connections and fuse protection.