Bedienungsanleitung JL Audio MHD750 (Seite 6 von 24) (Englisch)

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6 | JL Audio - MHD750/1 Owner’s Manual

POWER AND TURNON CONNECTIONS

Before installing the amplifier, disconnect the

negative (ground) wire from the vessel’s battery.

This will prevent accidental damage to the system,

the vessel and your body during installation.

Remote

Level

Control

Inputs

+12 VDC Ground Remote

Preouts

+12 VDC Ground Remote

+12V Battery Connection

You will need to connect a power wire to

the vessel’s positive battery terminal, using an

appropriate power ring or specialized battery

terminal connector, such as the JL Audio

XB-BTU. This connection must be tight and

corrosion-free to ensure proper connectivity.

This wire MUST be fused appropriately for safety.

Any positive power wires run through barriers

must be protected with a high quality insulating

grommet to prevent damage to the insulation

of the wire. Failure to do so may result in a

dangerous short circuit.

Power Wire Requirements

The MHD750/1’s “+12 VDC” and “Ground”

connections are designed to accept 4 AWG power

wire. 4 AWG pure copper wire is recommended

for any power wire run longer than 72 inches (180

cm). For runs shorter than 72 inches, 8 AWG pure

copper power wire is acceptable.

If you are installing the MHD750/1 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 MHD750/1

with 4 AWG or 8 AWG pure copper power wire.

Please note that lower AWG numbers mean

bigger wire and vice-versa (1/0 AWG is the largest,

2 AWG is smaller, then 4 AWG, then 8 AWG, etc.).

We do not recommend the use of “copper-clad

aluminum wire” or “CCA” wire because this

wire is significantly less conductive than pure

copper wire. Only use pure copper power wire,

such as JL Audio Premium Power Wire.

Tinned copper wire (silver color) is acceptable

as the tin-plating is only a very minor

component of the wire.

Fuse Requirements

The installation of a fuse on each power wire,

within 18 wire inches (45 cm) of the positive

battery terminal is vital to protect the wire and

the vessel from fire in the event of a collision or

short-circuit. The fuse value at each power wire

should be high enough for all of the equipment

being run from that power wire.

If only the MHD750/1 is being run from

that power wire, we recommend a 60A fuse

be used. 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

(large-blade) fuse and holder. Each amplifier

must be fused independently at the outputs of

the power distribution block. Use JL Audio part

XC-FOA-2PAK and appropriate MaxiFuse™ type

fuses with JL Audio distribution blocks.

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.

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JL Audio MHD750 Seite 6

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