JL Audio XD600/1, XD400/4 owner manual Product Description, Securely mount the amplifier

Product Description

The JL Audio XD400/4 is a four-channel, full-range audio amplifier utilizing JL Audio NexD™ ultra-high speed switching technology to deliver outstanding fidelity and efficiency.

The XD400/4 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 power wire from the battery location to the amplifier mounting location. True 8 AWG power wire may be used for runs shorter than 18 ft. For longer runs, use 4 AWG wire. Take care to route the wire in such a way that it will not be damaged and will not interfere with vehicle operation. Use 4 AWG or larger power wire and a power distribution block if additional amplifiers are being installed with the XD400/4.

 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 securely connected to the amplifier.

 4) Run signal cables and remote turn-on wire from the source unit to the final amplifier mounting location.

 5) Run speaker cables 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 of the JL Audio ECS master ground lug, XB-MGLU is recommended). Use 8 or 4 AWG 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.

 8) Connect the positive and negative power wires to the amplifier. A fuse near

the amplifier is not necessary if the XD400/4 is the only device being run from the fused main power wire. If the fused main power wire is shared by the XD400/4 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 (40A for a single XD400/4) and reconnect the negative battery post terminal. Install the fuse (40A) near the amplifier (if applicable).

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.

4 JL Audio - XD400/4 Owner’s Manual