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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.
The 300/2's “+12 VDC” and “Ground”
connections are designed to accept 8 - 4 AWG
power wire. 8 AWG is the minimum
recommended power wire size for this
amplifier.
If you are installing the 300/2 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
distribution block mounted as close to the amplifiers
as possible and should connect to the 300/2 with
8 - 4 AWGpower wire.
Please note that smaller AWG numbers mean
bigger wire and vice-versa (1/0 AWG is biggest, 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 amplifier,
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
receptacle on the front panel of the amplifier, 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.
The ground connection should be made using
the same gauge wire as the power connection
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 star washer to lock
down the connection is advisable.
Any wires run through metal barriers (such as
firewalls), 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 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.
IMPORTANT
!
JL AUDIO 300/2 5
PRODUCT DESCRIPTION
The JL Audio 300/2 is a two-channel full-range
amplifier utilizing patented Absolute Symmetry™
Class AB technology for both channels.These
channels benefit from JL Audio's exclusive R.I.P.S.
power supply design which optimizes the output of
for any impedance between 1.5 and 4 ohms per
channel (3 - 8Ω bridged).
The 300/2's flexible input and crossover sections
permit operation 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. Additional steps and different
procedures may be required in some applications. If
you have any questions, please contact your
authorized JLAudio 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 (minimum 8 AWG) 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. Use 2 AWG or 1/0 AWG
power wire if additional amplifiers are being
installed with the 300/2.
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
minimum 8 AWG power 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 the
supplied screws.
8) Connect the positive and negative power
wires to the amplifier. A fuse near the amplifier is
not necessary.
9) Connect the remote turn-on wire
to the amplifier.
10) Connect the RCA input cables
to the amplifier.
11) Connect the speaker wires 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 power wire fuse (40A for a
single 300/2) 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 B (page 13) for the recommended input
sensitivity setting method.
16) Enjoy the fruits of your labor with your
favorite music.
4 JL AUDIO 300/2