JL Audio 450/4V2 owner manual Product Description, JL Audio 450/4v2 is a four-channel system

PRODUCT DESCRIPTION

The JL Audio 450/4v2 is a four-channel system

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Class AB technology for all channels. All channels benefit from JL Audio’s exclusive R.I.P.S.

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of each channel pair for any impedance between 1.5 and 4 ohms per channel.

The staggered power distribution of the 1&2

and 3&4 channel pairs (150W x 2 for CH 1&2 and 75 x 2 for CH 3&4) allows for a wide variety of application options. The 450/4v2 can be operated in the following modes:

1)As a full-system amplifier in bi-amp mode with CH 1&2 driving subwoofers in low-pass mode (150W x 1 or 300W x 1) and CH 3&4 driving main speakers in high-pass mode (75W x 2).

2)As a high power four-channel satellite amplifier in a bi-amplified system, delivering high-passed signals to front and rear speaker systems. In this mode, we recommend that CH 1&2 drive the front speaker systems and CH 3&4 drive the rear speaker systems. Preamp outputs permit connection of a separate amplifier to drive the subwoofer system.

3)As a high power four-channel satellite amplifier in a tri-amplified system, delivering band-passed signals through CH 1&2 to mid-bass speakers and high- passed signals through CH 3&4 to mid- range/ tweeter speaker systems. Preamp outputs permit connection of a separate amplifier to drive the subwoofer system.

4)As a high power three-channel satellite amplifier, delivering 150W x 3 at 4Ω in high- pass mode to left, center and right speaker systems. This requires bridging the outputs of CH 3&4 to create an equal power third channel to complement CH 1&2. Preamp outputs permit connection of a separate amplifier to drive the subwoofer system.

The 450/4v2’s flexible input and crossover sections permit operation with a wide variety of source units and system configurations. The 450/4v2 can operate with a single pair of stereo inputs or with separate inputs for CH 1&2 and CH 3&4, if the source unit is equipped with front and rear outputs. The 450/4v2’s preamp output can send pass-through signals from the CH 1&2 inputs only or the CH 3&4 inputs only or it can sum all four input channels to feed a subwoofer amplifier. This latter mode allows for non-fading sub-bass with front to rear satellite fading.

As we said, it’s very flexible.

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

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connection and secure the disconnected cable to prevent accidental re-connection during installation. This step is not optional!

2)Run power wire (minimum 4 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 450/4v2.

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.

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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 4 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 6 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.

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 (60A for a

single 450/4v2) 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 22) for the recommended input sensitivity setting method.

16)Enjoy the fruits of your labor with your favorite music.

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