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Power and
negative (ground) wire from the vehicle’s battery. This will prevent accidental damage to the system, the vehicle and your body during installation.
+12V Battery Connection
You will need to connect a power wire to the vehicle’s positive battery terminal, using an appropriate power ring or specialized battery terminal connector, such as the JL Audio
Power Wire Requirements
The HD900/5’s “+12 VDC” and “Ground” connections are designed to accept 4 AWG power wire. 4 AWG pure copper wire is
the minimum recommended wire size for this amplifier. Use of smaller gauge wire (including cheap wire that is fraudulently sold as 4 AWG wire) can create a fire hazard.
If you are installing the HD900/5 with other amplifiers and wish to use a single main power wire, use 2 AWG or 1/0 AWG pure copper wire as a main power wire. 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 HD900/5 with 4 AWG pure copper power wire, with each smaller wire fused appropriately for each amplifier or other electronics in the system.
Please note that lower AWG numbers mean bigger wire and
We do not recommend the use of
Fuse Requirements
The installation of a fuse on the main power
wire, within 18 wire inches (45 cm) of the positive battery terminal is vital to protect the wire and the vehicle from fire in the event of a collision or
If only the HD900/5 is being run from a single power wire, install a 60A fuse to protect the wire: AGU (big glass fuse). AFS (small blade fuse) or MaxiFuse™ (big plastic- body fuse) types are recommended.
If other amplifiers are also being powered from a main power wire and exceed 80 amps in total fuse rating, we recommend the use of an ANL
Please consult with your JL Audio dealer to make sure that the wire, fuse holder and fuse ratings are appropriate for your system’s needs. The safety of your installation depends on appropriate power connections and fuse protection.
Ground Connection
The chassis ground connection must be made using 4 AWG pure copper wire 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,
6 JL Audio - HD900/5 Owner’s Manual