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JL Audio 3v2 Manual

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7
INPUT SECTION
(
L
)
(
R
)
Remote
Level
Control
CH. 1&2 SUB CH. Preouts
+12 VDC Ground
Remote
CH. 1
(
L
)
CH. 2
(
R
)
Bridged Mono Subwoofer Output
3 Channel Amplifier
Rem.
|
Oset
|
Signal
Input Voltage
Low
|
High
Turn-On Mode
If you wish to send four discrete channels into
the XD500/3v2, simply use all four inputs and set
the “Input Mode” switch in the “4 Ch.” position.
The amplifier will automatically combine the
left and right “Sub Ch.” input signals to mono.
If you have only one channel of subwoofer signal
available, it is acceptable to only use one of
the “Sub Ch.” inputs, but for optimal gain, we
recommend using a Y-adaptor and feeding both
“Sub Ch.” inputs.
You may also choose to apply only two
channels of input to deliver signal to all five
amplifier channels. To do this, set the “Input
Mode” switch to “2 Ch.” and use only the
inputs to channels 1 & 2. The amplifier
will automatically combine the main input
signals to mono for the subwoofer channel.
Input Voltage Range:
A wide range of signal input voltages can
be accommodated by the XD500/3v2’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 XD500/3v2. 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 XD500/3v2 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).
3 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.
… 7 …


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