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6 JL Audio
7
IMPORTANT
!
Make sure you observe correct polarity in
making the “High Level Input” connections.
Failure to do so will reduce bass and affect
stereo imaging.
The connections for the “High Level Inputs” plug
wires are as follows from left to right on the plug:
Channels 1&2 (FRONT)
White: Left Positive (+)
White/Black: Left Negative (–)
Black: Common Ground (rarely used)*
Gray: Right Positive (+)
Gray/Black: Right Negative (–)
Channels 3&4 (REAR or SUB)
Green: Left Positive (+)
Green/Black: Left Negative (–)
Black: Common Ground (rarely used)*
Purple: Right Positive (+)
Purple/Black: Right Negative (–)
*The only time you will use the Common Ground
connections is with some older (pre-1980’s) factory
systems or head units that ground their speakers to
chassis ground. To use these connections, ground
the black wires on the plugs to chassis ground and
only connect the Left and Right Positive plug wires
to the factory radio outputs.
INPUT SENSITIVITY CONTROLS
The control labeled “Input Sens.” can be used
to match the source unit’s output voltage to the
input stage the amplifier 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.)
Filter Frequency (Hz)Input Sens. Bass Boost
min max
50 500 O +9dB
Power Protect
LEFT
RIGHT
LEFT
RIGHT
Preamp
Outputs
Amplifier
Inputs
HP
|
Off
|
LP
Filter Mode
High-Level Inputs
To properly set the amplifier for maximum
clean output, please refer to Appendix A (page
12) in this manual. After using this procedure,
you can then adjust any or all “Input Sens.”
levels downward if this is required to achieve the
desired system balance.
IMPORTANT
!
Do not increase any “Input Sens.” setting for
any channel(s) of any amplifier in the system
beyond the maximum level established during
the procedure outlined in Appendix A (page
12). Doing so will result in audible distortion
and possible speaker damage.
TURNON LEAD
The J2-360.2 is turned on and off
using a conventional +12V remote turn-
on lead, typically controlled by the
source unit’s remote turn-on output.
Made in China
LEFT CHANNEL RIGHT CHANNEL
Bridged
FUSESGround
20A20A
Remote+ 12VDC
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.
18 AWG wire is more than adequate for
the remote turn-on connection. To connect
the remote turn-on wire to the amplifier, strip
1/2-inch (12 mm) of insulation from the wire
and insert it into the “Remote” receptacle on the
power connector. Tighten the connector down
using a Phillips screwdriver.
INPUT SECTIONS
The J2-360.2’s has one pair of stereo
inputs.The input section input section
offers two input connection methods, one
for high-level (speaker level) signals and
one for low-level (preamp level) signals.
1) Low-Level Inputs: A standard left/
right pair of RCA type jacks in the
“Amplifier Inputs” section is used for
preamp level (low-level) signal input
on the J2-360.2. This is the preferred
connection method whenever available.
Filter Frequency (Hz)Input Sens. Bass Boost
min max
50 500 O +9dB
Power Protect
LEFT
RIGHT
LEFT
RIGHT
Preamp
Outputs
Amplifier
Inputs
HP
|
Off
|
LP
Filter Mode
High-Level Inputs
2) High-Level Inputs: If your system does
not offer a preamp level signal option, you
can connect speaker level signals directly to
the “High-Level Inputs” connectors using
the supplied mating connectors and wire
harnesses. Simply splice the appropriate
left/right and positive/negative wires to the
included harnesses and plug the harness into
the “High-Level Inputs” connectors on the
amplifier. The J2-360.2 will attenuate the high-
level signals to make them compatible with its
input stages.
Filter Frequency (Hz)Input Sens. Bass Boost
min max
50 500 O +9dB
Power Protect
LEFT
RIGHT
LEFT
RIGHT
Preamp
Outputs
Amplifier
Inputs
HP
|
Off
|
LP
Filter Mode
High-Level Inputs