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4 | JL Audio - M1000/5v2 Owner’s Manual
5
POWER CONNECTIONS
Before installing the amplifier, disconnect the
negative (ground) wire from the vessel’s battery.
This will prevent accidental damage to the system,
the vessel and your body during installation.
The M1000/5v2’s “+12 VDC” and “Ground”
connections are designed to accept 4 AWG
power wire. 4 AWG is the required wire size for
this amplifier.
If you are installing the M1000/5v2 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 large power
wire should terminate into a fused distribution
block mounted as close to the amplifiers as
possible (within 12 inches / 30cm of wire length).
The fused output of the distribution block will
connect to the M1000/5v2 with 4 AWG power
wire. JL Audio ECS fused distribution blocks are
recommended (XD-FDBU-2 and XD-FDBU-4)
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 wires to the amplifier,
first back out the set screw on the top of the
terminal block, using the supplied 2.5 mm hex
wrench. Strip 1/2 inch (12 mm) of insulation from
the end of each wire and insert the bare wire into
the terminal block, seating it firmly so that no
bare wire is exposed. While holding the wire in
place, tighten the set screw firmly, taking care not
to strip the head of the screw.
Any wires run through barriers must
be protected with a high quality rubber
grommet to prevent damage to the
insulation of the wire. Failure to do so
may result in a dangerous short circuit.
Many vessels employ small (10 AWG -
6 AWG) wire to ground the battery to the vessel
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.
It is common for the alternator to be grounded
through its chassis. If the alternator is not
grounded through its chassis and instead employs
a small (10 AWG - 6 AWG) wire to connect to
ground, this wire should also be upgraded to 4
AWG when installing amplifier systems with main
fuse ratings above 60A.
FUSE REQUIREMENTS
It is absolutely vital that the main power
wire(s) to the amplifier(s) in the system be
fused within 18 inches (45 cm) of the positive
battery post connection. The fuse value at each
power wire should be high enough for all of the
equipment being run from that power wire. If
only the M1000/5v2 is being run from that power
wire, we recommend a 80A fuse be used.
If fusing the amplifier near its power
connections (when more than one amp is being
run from the main power wire), use a 80A fuse.
MAXI™ plastic-body fuses are recommended.
PRODUCT DESCRIPTION
The JL Audio M1000/5v2 is a five-channel,
system amplifier utilizing JL Audio NexD™ ultra-
high speed switching technology for its four main
channels and NexD™ high-speed switching for
its subwoofer channel. The NexD™ technologies
deliver outstanding fidelity and efficiency.
The M1000/5v2 can be operated with a wide
variety of source units and system configurations.
TYPICAL INSTALLATION SEQUENCE
The following represents the sequence
for a typical amplifier installation, using an
aftermarket source unit or OEM Interface
processor (like the CleanSweep CL441dsp).
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 4 AWG power wire from the battery
location to the amplifier mounting location.
Take care to route the wire in such a way that
it will not be damaged and will not interfere
with vessel operation. Use 2 AWG or larger
power wire and a power distribution block if
additional amplifiers are being installed with
the M1000/5v2.
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 vessel. Do
not install the fuse until the power wire has
been securely connected to the amplifier.
44) Connect negative power wire to the
negative battery post. Use the same size
power wire as the wire connected to the
“+12V” connection (minimum 4 AWG).
5) Run signal cables and remote turn-on wire
from the source unit to the amplifier
mounting location.
6) Run speaker cable from the speaker systems
to the amplifier mounting location.
7) Securely mount the amplifier.
8) Connect the positive and negative power
wires to the amplifier. A fuse near the
amplifier is not necessary if the M1000/5v2 is
the only device being run from the fused main
power wire. If the fused main power wire is
shared by the M1000/5v2 and 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.
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(s) (80A for a
single M1000/5v2) 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 14)
for the recommended input sensitivity
setting method.
16) Enjoy the fruits of your labor with your
favorite music.
3 …

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