JL Audio 300/2 Product Description, Typical Installation Sequence, Power Connections, Amplifier

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 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 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.

POWER CONNECTIONS
Before installing the amplifier, disconnect the		The ground connection should be made using
negative (ground) wire from the vehicle's battery.	the same gauge wire as the power connection
This will prevent accidental damage to the system,	and should be kept as short as possible, while
the vehicle and your body during installation.	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
The 300/2's “+12 VDC” and “Ground”
	a dangerous short circuit.
connections are designed to accept 8 - 4 AWG
power wire. 8 AWG is the minimum		!	IMPORTANT
recommended power wire size for this		Many vehicles employ small (10 AWG - 6 AWG)
amplifier.	wire to ground the battery to the vehicle chassis and
If you are installing the 300/2 with other	to connect the alternator's positive connection to the
amplifiers and wish to use a single main power wire,	battery.To prevent voltage drops, these wires should
use 2 AWG or 1/0 AWG main power wire	be upgraded to 4 AWG when installing amplifier
(depending on the overall current demands of all	systems with main fuse ratings above 60A.
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 AWG power 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.

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