Bedienungsanleitung JL Audio XD400 (Seite 7 von 20) (Englisch)

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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

If you wish to send four discrete channels into

the XD400/4, simply use all four inputs and set

the “Input Mode” switch in the “4 Ch.” position.

If you wish to use only two channels of input to

deliver signal to all four amplifier channels, set the

“Input Mode” switch to “2 Ch.” and use only the

inputs to channels 1 and 2. In this mode, channel

3 will operate with the channel 1 signal and

channel 4 will operate with the channel 2 signal.

Input Voltage Range:

A wide range of signal input voltages can

be accommodated by the XD400/4v2’s input

section (200mV – 8V). This wide range is split

up into two sub-ranges, accessible via the “Input

Voltage” switch:

“Low”: for preamp level signals

“High”: for speaker level signals

This switch affects all channels of the amplifier

equally. The “Low” position on the “Input

Voltage” switch selects an input sensitivity

range between 200mV and 2V. This means that

the “Input Sens.” rotary controls will operate

within that voltage window. If you are using

an aftermarket source unit, with conventional

preamp level outputs, this is the position you

should select.

The “High” position on the “Input Voltage”

switch selects an input sensitivity range between

800mV and 8V. This is useful for certain high-

output preamp level signals as well as speaker

level output from source units and small

amplifiers. To use speaker level sources, splice the

speaker output wires of the source unit or small

amplifier onto a pair of RCA cables or plugs,

or use the JL Audio ECS Speaker Wire to RCA

adaptor (XD-CLRAIC2-SW).

Line output converters are usually not needed

with the XD400/4v2. If you find that the output

cannot be reduced sufficiently with a direct

speaker level signal applied to the amplifier and

the “Input Voltage” switch in its “High” position,

you may use a line output converter or voltage

divider to reduce the signal level.

INPUT SENSITIVITY CONTROLS

The control labeled “Input Sens.” can be used

to match the source unit’s output voltage to the

input stage of the XD400/4v2 for maximum clean

output. Rotating the control clockwise will result

in higher sensitivity (louder for a given input

voltage). Rotating the control counter-clockwise

will result in lower sensitivity (quieter for a given

input voltage).

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

To properly set the amplifier for maximum

clean output, please refer to Appendix A (page

14) in this manual. After using this procedure,

you can then adjust the “Input Sens.” levels

downward if this is required to achieve the

desired system balance.

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