Bedienungsanleitung JL Audio XD400 (Seite 9 von 20) (Englisch)

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REMOTE LEVEL CONTROL OPTIONAL

With the addition of the optional Remote Level

Control (HD-RLC), you can control the volume

of one or both channel pairs of the XD400/4v2

from the front of the vehicle. This is useful for

subwoofer level control, rear channel level control,

center channel level control or even as a master

volume control for the system.

The HD-RLC connects to the jack labeled

“Remote Level Control” on the Connection

Panel of the amplifier using a standard telephone

cable (supplied with the HD-RLC). If desired,

multiple XD (and HD) amplifiers can be

controlled from a single HD-RLC controller using

a single-line, four-wire phone line splitter and

multiple phone cables.

When connected to the amplifier, the HD-RLC

operates as follows: At full counter-clockwise

rotation, the audio will mute completely. At full

clockwise rotation the level will be the same as if

the HD-RLC was not connected at all. In other

words, it operates strictly as a level attenuator.

Input Mode

2 Ch.

4 Ch.

All

3&4

1&2

Sum

Preouts From Remote Level Mode

4 Channel Amplifier

Rem.

Oset

Signal

Input Voltage

Low

High

Turn-On Mode

“Remote Level Mode” Switch: This switch allows

you to assign the operation of the HD-RLC to one

or both pairs of channels.

In the “A l l” position, the HD-RLC knob will

affect all channels equally.

In the “3&4” position, only the level of

channels 3 and 4 will be affected by the HD-RLC

knob (channels 1, and 2 will not).

PREOUTS

The XD400/4v2 incorporates a buffered, pass-

through preamp output section, so that additional

amplifiers can be easily added to the system. This

pass-through preamp output can be configured

two different ways using the switch labeled

“Preouts From”.

1) “1&2”: the preamp output delivers the same

signal that is connected to the “CH 1&2”

inputs. This mode is useful for feeding a

subwoofer amplifier when the XD400/4v2

is being used to drive front and rear speaker

systems. In this mode, the preamp output

signal will depend only on the input signal level

of “CH 1&2”, allowing channels 3&4 to

be faded without affecting the subwoofer level.

If “CH 1&2” is faded in this mode,

the signal level of the preamp output

would change accordingly.

2) “Sum”: When the XD400/4v2 is being used

to drive front and rear speaker systems, this

preamp output mode will deliver a summed

front/rear stereo signal to a subwoofer amplifier,

while permitting fading of the front and

rear speaker systems from the source unit.

This method prevents a loss of signal to the

subwoofer amplifier when the system is faded to

the front or the rear by the head unit.

Note: Any signal delay between the front and rear

channels can result in a cancellation of signals

within certain frequency ranges when using the

“Sum” position. If you experience a loss of bass

output in the “Sum” position, compared to the

“1&2” position, you are likely dealing with a

delayed signal in either the front or rear outputs

of the source unit. If the front to rear delay is

desirable for other reasons or if it cannot be

defeated at the source unit, we recommend that

you use the “1&2” position.

Note: The preamp output delivers the same signal

that is connected to the XD400/4v2’s inputs.

The preamp output signal is not affected by the

amplifier’s filter controls. If the input signal is

full-range, the preamp output will be full-range.

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