Bedienungsanleitung JL Audio HD750 (Seite 7 von 24) (Englisch)

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Ground Connection

The chassis ground connection must be

made using 4 AWG or 8 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, metal-to-metal connection between

the chassis and the termination of the ground

wire with a brass or copper power ring. For

optimal grounding, we recommend the

use of a JL Audio ECS master ground lug

(XB-MGLU). Alternatively, a sheet metal

screw or bolt can be used with a star washer.

Many vehicles employ small (10 AWG - 6 AWG)

wire to ground the battery to the vehicle chassis

and to connect the alternator’s positive

connection to the battery. To prevent voltage

drops, these wires should be upgraded to 4

AWG pure copper wire when installing amplifier

systems with main fuse ratings above 60A.

Turn-On Wire

The HD750/1 uses a conventional +12V remote

turn-on wire, typically controlled by the source

unit’s remote turn-on output. The amplifier will

turn on when +12V is present at its “Remote”

input and turn off when +12V is switched off. If

a source unit does not have a dedicated remote

turn-on output, the amplifier’s turn-on lead can

be connected to +12V via a switch that derives

power from an ignition-switched circuit.

The HD750/1’s “Remote” turn-on connector

is designed to accept 18 AWG – 12 AWG wire. 18

AWG is more than adequate for this purpose.

To connect the remote turn-on wire to the

amplifier, first back out the set screw on the

bottom of the Power Connector Plug, using the

supplied 2.5 mm hex wrench. Strip 1/2 inch

(12mm) of wire and insert the bare wire into the

receptacle, seating it firmly so that no bare wire

is exposed. When using smaller wire, it may

be necessary to strip 1 inch of insulation from

the wire and fold the bare wire in half prior to

insertion. While holding the wire in the terminal,

tighten the set screw firmly using the supplied

2.5 mm hex wrench, taking care not to strip the

head of the screw and making sure that the wire

is firmly gripped by the set screw.

Amplifier Power Connector Plug

To connect the power wires and the remote

turn-on wire to the amplifier, unplug the power

connector plug from the amplifier chassis (pull

back firmly) and back out the set screws on

the connector plug, using the supplied 4 mm

hex wrench for the “+12 VDC” and “Ground”

connections and the supplied 2.5 mm hex wrench

for the “Remote” connection. Strip 3/8 inch (10

mm) of insulation from the end of each wire and

insert the bare wire into the receptacle on power

connector plug, seating it firmly so that no bare

wire is exposed. While holding each wire in place,

tighten each set screw firmly, taking care not to

strip the head of the screw.

Never make power connections with a “live”

wire. Always disconnect the negative battery

post before making any connections or

adjustments to a 12V power connection!

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JL Audio HD750 Seite 7

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