JL Audio XD1000/1v2 User manual

Thank you for purchasing a JL Audio amplifier for
your automotive sound system.
Your amplifier has been designed and manufactured to exacting
standards in order to ensure years of musical enjoyment in your vehicle.
For maximum performance, we highly recommend that you have
your new amplifier installed by an authorized JL Audio dealer. Your
authorized dealer has the training, expertise and installation equipment
to ensure optimum performance from this product. Should you
decide to install the amplifier yourself, please take the time
to read this manual thoroughly to familiarize yourself
with its installation requirements and setup procedures.
If you have any questions regarding the instructions in this
manual or any aspect of your amplifier’s operation, please contact your
authorized JL Audio dealer for assistance. If you need further assistance,
please call the JL Audio Technical Support Department
at [phone] during business hours.
OWNER’S MANUAL
1000W Monoblock Class D Subwoofer Amplier

2 | JL Audio - XD1200/1v2 Owner’s Manual 3
ENGLISH
Cooling Efficiency Considerations:
The outer shell of your JL Audio amplifier is
designed to remove heat from the amplifier
circuitry. For optimum cooling performance, this
outer shell should be exposed to the largest
possible volume of air. Enclosing the amplifier in
a small, poorly ventilated chamber can lead to
excessive heat build-up and degraded
performance. If an installation calls for an
enclosure around the amplifier, we recommend
that this enclosure be ventilated with the aid
of a fan. In normal applications, fan-cooling
is not necessary.
Mounting the amplifier upside down is
strongly discouraged.
If mounting the amplifier under a seat,
make sure there is at least 1 inch (2.5 cm) of
space above the amplifier’s outer shell to permit
proper cooling.
Safety Considerations:
Your amplifier needs to be installed in a dry,
well-ventilated environment and in a manner
which does not interfere with your vehicle’s safety
equipment (air bags, seat belt systems, ABS brake
systems, etc.). You should also take the time to
securely mount the amplifier so that it does not
come loose in the event of a collision or a sudden
jolt to the vehicle.
Stupid Mistakes to Avoid
tCheck before drilling any holes in your vehicle
to make sure that you will not be drilling
through a gas tank, brake line, wiring harness or
other vital vehicle system.
t%POPUSVOTZTUFNXJSJOHPVUTJEFPSVOEFSOFBUI
the vehicle. This is an extremely dangerous
practice which can result in severe damage to
your vehicle and person.
t1SPUFDUBMMTZTUFNXJSFTGSPNTIBSQNFUBM
edges and wear by carefully routing them,
tying them down and using grommets and
loom where appropriate.
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compartment, under the vehicle, on the roof
or in any other area that will expose the
amplifier circuitry to the elements.
PROTECT YOUR HEARING!
We value you as a long-term customer. For
that reason, we urge you to practice restraint in
the operation of this product so as not to damage
your hearing and that of others in your vehicle.
Studies have shown that continuous exposure to
high sound pressure levels can lead to permanent
(irreparable) hearing loss. This and all other
high-power amplifiers are capable of producing
such high sound pressure levels when connected
UPBTQFBLFSTZTUFN1MFBTFMJNJUZPVSDPOUJOVPVT
exposure to high volume levels.
While driving, operate your audio system in
a manner that still allows you to hear necessary
noises to operate your vehicle safely (horns,
sirens, etc.).
SERIAL NUMBER
In the event that your amplifier requires
service or is ever stolen, you will need to have
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take the time to enter that number in the space
provided below. The serial number can be found
on the bottom panel of the amplifier and on the
amplifier packaging.
Serial Number:
INSTALLATION APPLICATIONS
This amplifier is designed for operation in
vehicles with 12 volt, negative-ground electrical
systems. Use of this product in vehicles with
positive ground and/or voltages other than 12V
may result in damage to the product and will void
the warranty.
This product is not certified or approved for
use in aircraft.
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amplifier with the outputs of a second amplifier,
including an identical one.
PLANNING YOUR INSTALLATION
It is important that you take the time to read
this manual and that you plan out your
installation carefully. The following are some
considerations that you must take into account
when planning your installation.
Status
LED
(pg. 11)
Filter
Frequency
Selector
(pg. 9)
LP Filter
Mode/Slope
Selection
(pg. 8)
Input Sensitivity
Control
(pg. 8)
Infrasonic
Filter
Selection
(pg. 9)
Input
Voltage
(pg. 7)
Turn-On
Mode
(pg. 6)
Remote Turn-On
Connector
(pg. 7)
Chassis Ground
Connector
(pg. 5)
Left & Right
Preamp Input Jacks
(pg. 7)
+12 V Power
Connector
(pg. 5)
Mono
Subwoofer Outputs
(pg. 10)
Jack for
Remote Level
Control Knob
(pg. 9)
Left & Right
Preamp Output Jacks
(pg. 10)

4 | JL Audio - XD1200/1v2 Owner’s Manual 5
ENGLISH
POWER CONNECTIONS
Before installing the amplifier, disconnect the
negative (ground) wire from the vehicle’s battery.
This will prevent accidental damage to the system,
the vehicle and your body during installation.
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iGroundwconnections are designed to
accept 4 AWG power wire. 4 AWG is the
required wire size for this amplifier.
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other amplifiers and wish to use a single main
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wire (depending on the overall current demands
of all the amplifiers in the system). This 2 AWG
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a fused distribution block mounted as close
to the amplifiers as possible (within 12 inches
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the distribution block will connect to the
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ECS fused distribution blocks are recommended
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Note: Smaller AWG numbers mean bigger wire
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smaller, then 4 AWG, then 8 AWG, etc.).
To connect the power wires to the amplifier,
first back out the set screw on the top of the
terminal block, using the supplied 2.5 mm hex
wrench. Strip 1/2 inch (12 mm) of insulation from
the end of each wire and insert the bare wire into
the terminal block, seating it firmly so that no
bare wire is exposed. While holding the wire in
place, tighten the set screw firmly, taking care not
to strip the head of the screw.
The ground connection should be made
using 4 AWG 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.
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.
Any wires run through metal barriers (such
as firewalls), must be protected with a high
quality rubber grommet to prevent damage to the
insulation of the wire. Failure to do so may result
in a dangerous short circuit.
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 when installing amplifier systems
with main fuse ratings above 60A.
FUSE REQUIREMENTS
It is absolutely vital that the main power
wire(s) to the amplifier(s) in the system be
fused within 18 inches (45 cm) of the positive
battery post connection. The fuse value at each
power wire should be high enough for all of the
equipment being run from that power wire. If
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QPXFSXJSFVTFB"GVTF
If fusing the amplifier near its power
connections (when more than one amp is being
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(MAXI™ big plastic-body fuse is recommended).
PRODUCT DESCRIPTION
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BNQMJGJFSVUJMJ[JOH+-"VEJP/FY%IJHI
speed switching technology to deliver
outstanding fidelity and efficiency.
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variety of source units and system configurations.
Its frequency response is limited to the range
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midrange speakers or tweeters. Every aspect of its
operation has been optimized for low-frequency
amplification. For detailed specifications, please
refer to Appendix C (page 13).
TYPICAL INSTALLATION SEQUENCE
The following represents the sequence
for a typical amplifier installation, using an
aftermarket source unit or OEM Interface
processor (like the CleanSweep CL441dsp).
Additional steps and different procedures may
be required in some applications. If you have
any questions, please contact your authorized
JL Audio dealer for assistance.
1)%JTDPOOFDUUIFOFHBUJWFCBUUFSZQPTU
connection and secure the disconnected cable
to prevent accidental reconnection during
installation. This step is not optional.
2) Run 4 AWG power wire from the battery
location to the amplifier mounting location,
taking care to route it in such a way that it will
not be damaged and will not interfere with
vehicle operation. Use 2 AWG or larger power
wire and a fused power distribution block if
additional amplifiers are being installed with
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3) Connect power wire to the positive battery
post. Fuse the wire with an appropriate fuse
block (and connectors) within 18 inches (45
cm) wire length of the positive battery post.
This fuse is essential to protect the vehicle.
Do not install the fuse until the power wire
has been securely connected to the amplifier.
4) Run signal cables and remote turn-on wire
from the source unit to the final amplifier
mounting location.
5) Run speaker cables from the speaker systems
to the amplifier mounting location.
6) Find a good, solid metal grounding point
close to the amplifier and connect the
negative power wire to it using appropriate
hardware (use of the JL Audio ECS master
ground lug, XB-MGLU is recommended).
Use 4 AWG wire, no longer than 36 inches
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connection point. In some vehicles, it may be
necessary to upgrade the battery ground wire.
(See page 5 for important notice).
7) Securely mount the amplifier.
8) Connect the positive and negative power
wires to the amplifier. A fuse near the
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is the only device being run from the fused
main power wire. If the fused main power
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amplifiers or devices, fuse each amplifier/
EFWJDFXJUIJOJODIFTDNPGXJSF
length, via a fused distribution block
or multiple individual fuse blocks/
on-board fuses.
9) Connect the remote turn-on wire
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ModewTXJUDIGPSBVUPNBUJDUVSOPO
10) Connect the input cables to the amplifier.
11) Connect the speaker cables to the amplifier.
12) Carefully review the amplifier’s control
settings to make sure that they are set
according to the needs of the system.
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negative battery post terminal. Install the fuse
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14) Turn on the source unit at a low level
to double-check that the amplifier is
configured correctly. Resist the temptation
to crank it up until you have verified the
control settings.
15) Make necessary adjustments to the input
sensitivity controls to obtain the right
overall output and the desired balance
in the system. See Appendix A (page 12)
for the recommended input sensitivity
setting method.
16) Enjoy the fruits of your labor with your
favorite music.

6 | JL Audio - XD1200/1v2 Owner’s Manual 7
ENGLISH
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amplifier’s iRemotewUVSOPOUFSNJOBMCFDPNFT
a remote turn-on output. This allows the
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audio system that do not have signal sensing.
INPUT SECTION
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balanced input topology that provides the user
with a high degree of input flexibility, while
retaining superior noise rejection. This type of
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voltage inputs from factory source unit outputs
without excessive distortion or noise problems.
You may run a stereo or a mono signal into
the inputs of the amplifier. The amplifier’s input
section automatically sums stereo signals to mono
for the internal amplifier section. The amplifier
will operate with only one input connection
but will require an increase in input sensitivity
to overcome the loss of signal. If a mono input
signal is to be run, we recommend that you use
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inputs of the amplifier. If you are feeding only
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4JHOBM4FOTJOHi5VSO0O.PEFwZPVNVTUVTF
the left-channel input for the automatic turn-on
to operate.
Input Voltage Range:
Input Voltage Range: A wide range of signal
input voltages can be accommodated by the
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This wide range is split up into two sub-ranges,
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iLowwGPSQSFBNQMFWFMTJHOBMT
iHighwGPSTQFBLFSMFWFMTJHOBMT
5IFiLowwQPTJUJPOPOUIFiInput Voltagew
switch selects an input sensitivity range between
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rotary control 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.
5IFiHighwQPTJUJPOPOUIFiInput Voltagew
switch selects an input sensitivity range between
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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
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Line Output Converters are usually not needed
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cannot be reduced sufficiently with a direct
speaker level signal applied to the amplifier and
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you may use a Line Output Converter or voltage
divider to reduce the signal level.
TURNON OPTIONS
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using one of three methods, determined by the
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TXJUDI1MFBTFSFBEUIFTFPQUJPOTBOEEFDJEF
which is best suited for your specific system.
1) +12V remote turn-on lead (preferred)
2) Signal-sensing turn-on circuit
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+12 V Remote Turn-On: This is the preferred
method for turning the amplifier on/off. The
amplifier will turn on when +12 V is present at
JUTiRemotewJOQVUBOEUVSOPGGXIFO7JT
switched off. This +12 V remote turn-on signal is
typically controlled by a source unit's remote
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wire. To connect the remote turn-on wire to
the amplifier, first back out the set screw on the
top of the terminal block, using the supplied 2.5
mm hex wrench. Strip 1/2 inch (12mm) of wire
and insert the bare wire into the terminal block,
seating it firmly so that no bare wire is exposed.
While holding the wire in the terminal, tighten
the set screw firmly, taking care not to strip the
head of the screw and making sure that the wire
is firmly gripped by the set screw.
If a source unit does not have a dedicated
remote turn-on output, consider one of the
following alternative turn-on options:
These methods are useful when a conventional
+12 V remote turn-on signal is not available in a
system. These allow you to operate the amplifier
without having to locate a remote turn-on lead at
the source unit, which can be very useful when
interfacing the amplifier with OEM (factory)
audio systems that do not use conventional +12 V
turn-on leads.
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signal, one of the following methods may work
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Offset-Sensing first as it does not require a long
delay to turn the system off after the signal is
shut off.
DC Offset-Sensing: The amplifier will turn on
and off by detecting the presence of a very small
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output of most OEM (factory) source units and
amplifiers. The amplifier will turn on and off in
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Offset. The sensitivity of this circuit is designed
for high-level (speaker level) signals, not for low-
level (preamp level) signals. The circuit senses the
left-channel signal only.
Signal-Sensing: The amplifier will turn on and
off by detecting the presence of a full-range
audio signal at its left-channel input. After
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off. The sensitivity of this circuit is designed for
high-level (speaker level) signals, not for low-level
(preamp level) signals. The circuit is tuned to
react to signals at mid-range frequencies. This
prevents false switching from signals created by
moving loudspeakers that are in parallel with the
amplifier’s input signal.

8 | JL Audio - XD1200/1v2 Owner’s Manual 9
ENGLISH
Note:5IFBCPWFIJOUJTOPUiTFUJOTUPOFwy
You should always listen to the system carefully to
determine the best choice as vehicle acoustics and
other factors play a big role in choosing the most
appropriate filter slope.
3) Precise Frequency Selection: The filter
frequency markings on the front panel of
the amplifier are for reference purposes and
are generally accurate to within 1/3 octave
or better. If you would like to select the filter
frequency with a higher level of precision,
consult Appendix B (page 13) of this manual.
This chart gives you a more accurate frequency
for each of the forty detented positions of the
frequency selection control. This method can
be very useful if the amplifier is mounted in
a location where you can’t see the front panel
markings easily.
4) Defeating the LP Filter:5IF-PX1BTTGJMUFS
can also be defeated completely, by switching
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iOffwQPTJUJPO5IJTJTVTFGVMJGZPVBSFVTJOH
an external active crossover in the system.
With the internal crossover turned off, the
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)[EVFUPJUTTVCXPPGFSTQFDJGJDEFTJHO
INFRASONIC FILTER
5IFiInfrasonic FilterwJTBE#PDUBWFIJHI
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This filter is designed to conserve amplifier power
and protect subwoofer systems, without audibly
degrading the sub-bass output.
With ported enclosures, the use of the
iInfrasonic FilterwJTIJHIMZSFDPNNFOEFEUP
protect the speaker(s) from excessive excursion
below box tuning.
With sealed enclosures, the use of the filter
is less necessary, but can still help protect the
speaker system from excessive excursion.
5IFiInfrasonic FilterwDBOCFDPNQMFUFMZ
EFGFBUFECZTFMFDUJOHUIFiOffwQPTJUJPOPOJUT
switch. This bypasses all signal from flowing
through the circuit.
REMOTE LEVEL CONTROL OPTIONAL
With the addition of the optional Remote
-FWFM$POUSPM)%3-$ZPVDBODPOUSPMUIF
subwoofer volume from the front of the vehicle
5IF)%3-$DPOOFDUTUPUIFKBDLMBCFMFE
iRemote Level ControlwPOUIF$POOFDUJPO
1BOFMPGUIFBNQMJGJFSVTJOHBTUBOEBSEUFMFQIPOF
DBCMFTVQQMJFEXJUIUIF)%3-$*GEFTJSFE
NVMUJQMF9%BOE)%BNQMJGJFSTDBOCF
DPOUSPMMFEGSPNBTJOHMF)%3-$DPOUSPMMFS
using a single-line, four-wire phone line splitter
and multiple phone cables.
When connected to the amplifier, the
)%3-$PQFSBUFTBTGPMMPXT"UGVMMDPVOUFS
clockwise rotation, the audio will mute
completely. At full clockwise rotation the level
XJMMCFUIFTBNFBTJGUIF)%3-$XBTOPU
connected at all. In other words, it operates
strictly as a level attenuator.
INPUT SENSITIVITY CONTROLS
5IFDPOUSPMMBCFMFEiInput Sens.wDBOCFVTFE
to match the source unit’s output voltage to the
input stage of the XD1000/1v2 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).
To properly set the amplifier for maximum
clean output, please refer to Appendix A (page
12) in this manual. After using this procedure,
ZPVDBOUIFOBEKVTUUIFiInput Sens.wMFWFMT
downward if this is required to achieve the
desired system balance.
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.
FILTER CONTROLS
Most speakers are not designed to reproduce
the full range of frequencies audible by the human
ear. For this reason, most speaker systems are
comprised of multiple speakers, each dedicated
to reproducing a specific frequency range. Filters
are used to select which frequency range is sent
to each section of a speaker system. The division
of frequency ranges to different speakers can be
done with passive filters (coils and/or capacitors
between the amplifier outputs and the speakers),
which are acceptable and commonly used
for filtering between mid-range speakers and
tweeters. Filtering between subwoofer systems
and satellite speaker systems is best done with
active filters, which cut off frequency content at
the input to the amplifier. Active filters are more
stable than passive filters and do not introduce
extraneous resistance, which can degrade
subwoofer performance.
The active low-pass filter built into the
9%WJTEFTJHOFEUPBUUFOVBUFGSFRVFODJFT
above its filter frequency, so that the system’s
subwoofers do not reproduce any audible
midrange content.
This serves to improve tonal balance
and to avoid distortion. Correct use
of the filter can substantially improve
the fidelity of your audio system.
2) LP Filter Operation: The low-pass filter in the
9%WJTGVMMZWBSJBCMFCFUXFFO)[
BOE)[WJBUIFiFilter Freq.wDPOUSPMLOPC
)[JTBHPPETUBSUJOHQPJOUGPSUVOJOHNPTU
systems). The filter also features the ability to
TFMFDUCFUXFFOBNPEFSBUFi12dBwQFSPDUBWF
PSBTUFFQi24dBwQFSPDUBWFTMPQFWJBUIFiLP
Filter Mode/SlopewTXJUDI
 %FQFOEJOHPOUIFTVCXPPGFSTZTUFNBOE
the vehicle, different slopes may be required
to produce a smooth transition to the mid-
bass speakers in the system. Experiment to
find the slope which best matches the acoustic
requirements of your system.
Tuning Hint: A trunk mounted sub whose
PVUQVUIBTUPiGJHIUwUISPVHIBSFBSEFDLPSB
backseat often benefits from the 12 dB/octave
slope which lets more upper bass content pass
through. A sub that fires directly into the
listening environment is more likely to benefit
from a 24 dB/octave slope.

10 | JL Audio - XD1200/1v2 Owner’s Manual 11
ENGLISH
STATUS LED / PROTECTION CIRCUITRY
5IFSFJTBTJOHMFNVMUJDPMPS-&%POUIFUPQ
surface of the amplifier to indicate the amplifier’s
operating status.
1) Flashing Green: amplifier is powering up,
audio output is muted.
2) Constant Green: amplifier is on and
functioning normally, audio output is active.
3) Constant Red: lights to indicate that the
amplifier has exceeded its safe operating
temperature, putting the amplifier into a
self-protection mode, which reduces the
peak power output of the amplifier without
muting the audio. When its temperature returns
to a safe level, the red light will return to green
and the amplifier will return to full power
operating mode.
4) Constant Amber (Yellow): Indicates
that an over-current condition has occurred and
is accompanied by a muting of the amplifier’s
output. Because the muting behavior may be
very short in duration, it may manifest itself as
an audible, repetitive ticking or thumping noise
in the output. Over-current conditions can be
caused by a speaker impedance lower than the
optimum load impedance range for the amplifier
or a short-circuit in the speaker wiring. The
latter can result from a short circuit between the
positive and negative speaker wires or between
either speaker wire and the vehicle chassis.
5IFiStatus LEDwXJMMSFNBJOBNCFSGPSBGFX
seconds, even if the over-current condition is of a
very short duration.
5) LED off / Amplifier Shuts Off Unexpectedly
The only condition that will shut down
BOVOEBNBHFE9%WDPNQMFUFMZJTJG
battery voltage or remote turn-on voltage drops
CFMPXWPMUT5IFiStatus LEDwXJMMUVSOPGG
when this occurs. The amplifier will turn back
on when voltage climbs back above 11 volts.
If this is happening in your system, have your
charging system and power wiring inspected.
For more information on troubleshooting this
BNQMJGJFSSFGFSUP"QQFOEJY%QBHFT.
SERVICING YOUR JL AUDIO AMPLIFIER
If your amplifier fails or malfunctions, please
return it to your authorized JL Audio dealer so
that it may be sent in to JL Audio for service.
There are no user serviceable parts or fuses inside
the amplifier. The unique nature of the circuitry
in the JL Audio amplifiers requires specifically
USBJOFETFSWJDFQFSTPOOFM%POPUBUUFNQU
to service the amplifier yourself or through
unauthorized repair facilities. This will not only
void the warranty, but may result in the creation
of more problems within the amplifier.
If you have any questions about the installation or
setup of the amplifier that have not been covered
in this manual, please contact your dealer or
technical support.
JL Audio Technical Support:
[phone]
9:00 AM – 5:30 PM (Eastern Time Zone)
Monday - Friday
PREOUTS
5IF9%WJODPSQPSBUFTBCVGGFSFEQBTT
through preamp output section, so that additional
amplifiers can be easily added to the system.
The preamp output delivers the same signal that
JTDPOOFDUFEUPUIF9%WTJOQVUT
The preamp output signal is not affected by
UIFBNQMJGJFST-1'JMUFSJGUIFJOQVUTJHOBMJTGVMM
range, the preamp output will be full-range).
If you plan to use the “Preouts” to feed
a stereo amplifier, you must connect a
stereo signal to the input of the amplifier.
A mono signal into the amplifier will result
in a mono signal out of the preamp output.
SUBWOOFER OUTPUTS
5IF9%WJTEFTJHOFEUPEFMJWFSQPXFS
into subwoofer loads equal to or greater than 2
ohms of nominal impedance.
5IF9%WTTVCXPPGFSPVUQVUTBSF
designed to accept 16 AWG - 8 AWG wire. To
connect the subwoofer wires to the amplifier,
first back out the set screws on the top of the
terminal block, using the supplied 2.5 mm hex
wrench. Strip 1/2 inch (12 mm) of insulation
from the end of each wire and insert the bare
wire into the terminal block, seating it firmly
so that no bare wire is exposed. While holding
the wire in place, tighten the set screw firmly,
taking care not to strip the head of the screw.
:PVXJMMOPUJDFUIBUUIFSFBSFUXPi+wpositive
DPOOFDUJPOTBOEUXPi–wOFHBUJWFDPOOFDUJPOT
This is to facilitate multiple subwoofer wiring.
The two positive and two negative connections
are connected in parallel inside the amplifier.
They are not stereo outputs. Connecting two
subwoofers, each to one set of positive and
negative terminals, will result in a parallel
subwoofer connection. When only connecting
one pair of subwoofer wires, it is not necessary to
use both sets of connections.
Subwoofer loads below 2 ohms nominal are not
recommended and may cause the amplifier
to initiate a protection mode, which reduces
power output.

12 | JL Audio - XD1200/1v2 Owner’s Manual 13
ENGLISH
APPENDIX B:
Precise Frequency Selection Chart
“FILTER FREQ” AMP FILTER
Detent Panel Actual
Number Marking Freq.
Full counter-clockwise: 53
01............................53
02...........“50” ............53
03............................54
04............................54
05............................55
06............................57
07............................59
08...........“60” ............61
09............................63
10............................65
11............................67
12............................70
13............................72
14............................75
15............................78
16...........“80” ............81
17............................85
18............................88
19............................93
20.......“12 o’clock” ........97
21...........................102
22...........................107
23...........................113
24..........“120” ..........120
25...........................127
26...........................135
27...........................144
28...........................156
29...........................169
30...........................184
31...........................203
32..........“200” ..........227
33...........................254
34...........................290
35...........................337
36...........................392
37...........................426
38..........“500” ..........447
39...........................467
Full-clockwise: 470
APPENDIX C:
XD1000/1v2 Specifications
General Specifications:
Recommended Fuse Value: 80A
Recommended Fuse Type: MAXI® or AGU
Input Sections:
No. of Inputs: One Stereo Pair
Input Type: Differential-balanced with RCA jack inputs
Input Range: 200mV - 8V RMS
Amplifier Section:
Amplifier Topology: NexD™ High Speed Class D
Power Supply: Unregulated MOSFET switching type
Rated Power at 14.4V with less than
1% THD+Noise (20Hz - 20 kHz)
600W RMS x 1 @ 4 ohms
800W RMS x 1 @ 3 ohms
1000W RMS x 1 @ 2 ohms
Rated Power @ 12.5V with less than
1% THD + Noise (20Hz - 20 kHz)
500W RMS x 1 @ 4 ohms
650W RMS x 1 @ 3 ohms
800W RMS x 1 @ 2 ohms
Signal to Noise Ratio:
>83 dB referred to rated power
(A-weighted, 20 Hz-20 kHz noise bandwidth)
>53 dB referred to 1W
(A-weighted, 20 Hz-20 kHz noise bandwidth)
Frequency Response: 7 Hz - 500 Hz (+0, -1dB)
Damping Factor:
>1000 @ 4 ohms / 50 Hz
>500 @ 2 ohms / 50 Hz
Amplifier Filters:
Amplifier Low-Pass Filter:
State-variable, 12 dB/octave Butterworth or 24 dB/octave
Linkwitz-Riley with continuously variable cutoff frequency
selection from 50 - 500 Hz (defeatable).
Infrasonic Filter:
24 dB/octave Butterworth @ 30 Hz (defeatable).
Preamp Output:
Buffered pass-through type.
Dimensions(LxWxH):
14.73” x 7.09” x 2.05” (374mm x 180mm x 52mm)
APPENDIX A:
Input Sensitivity Level Setting
Following the directions below will allow the
installer to adjust the input sensitivity of each
amplifier channel pair simply and easily in just a
few minutes using equipment which is commonly
available in installation bays.
Necessary Equipment
t%JHJUBM"$7PMUNFUFS
t$%XJUIBTJOFXBWFUFTUUPOFSFDPSEFEBU
E#SFGFSFODFMFWFMJOUIFGSFRVFODZSBOHF
to be amplified for that set of channels
)[GPSTVCXPPGFSDIBOOFMTL)[GPSB
NJESBOHFBQQMJDBUJPO%POPUVTFBUUFOVBUFE
UFTUUPOFTE#E#FUD
The Nine-Step Procedure
1)%JTDPOOFDUUIFTQFBLFSTGSPNUIF
amplifier’s speaker output connectors.
2) Turn off all processing (bass/treble, loudness,
EQ, etc.) on the source unit, processors (if
used) and amplifier. Set fader control to center
position and subwoofer level control to 3/4 of
NBYJNVNJGVTFEUPGFFEUIF9%W
3)5VSOUIFBNQMJGJFSTiInput Sens.wcontrol all
the way down.
4) Set the source unit volume to 3/4 of full
volume. This will allow for reasonable gain
overlap with moderate clipping at full volume.
5) Using the chart on this page, determine the target
voltage for input sensitivity adjustment according
to the nominal impedance of the speaker system
connected to the amplifier outputs.
6) Verify that you have disconnected the speakers
CFGPSFQSPDFFEJOH1MBZBUSBDLXJUIBO
appropriate sine wave (within the frequency
SBOHFUPCFBNQMJGJFECZUIF9%WBU
3/4 source unit volume.
7) Connect the AC voltmeter to the speaker output
connectors of the amplifier. Make sure you test
UIFWPMUBHFBUUIFDPSSFDUDPOOFDUPSTBOEo
8)*ODSFBTFUIFiInput Sens.wcontrol until the
target voltage is observed with the voltmeter.
9)0ODFZPVIBWFBEKVTUFEUIF9%WUP
its maximum low-distortion output level,
SFDPOOFDUUIFTQFBLFST5IFiInput Sens.w
controls can now be adjusted downward if the
amplifier requires attenuation to achieve the
desired system balance.
Do not increase any “Input Sens.wsetting for
any amplifier channel or channel pair in the
system beyond the maximum level established
during this procedure. Doing so will result in
audible distortion and possible speaker damage.
It will be necessary to re-adjust the
iInput Sens.wif any equalizer boost is activated
BGUFSTFUUJOHUIFiInput Sens.wwith this
procedure. This applies to any EQ boost circuit,
including source unit tone controls or EQ
circuits. EQ cuts will not require re-adjustment.
Nom. Impedance Target AC Voltage
4 63.2 V
3 49.0 V
2 34.6 V
1 Not Recommended
Due to ongoing product development, all specifications are subject to
change without notice.

14 | JL Audio - XD1200/1v2 Owner’s Manual 15
ENGLISH
“My amplifier shuts off once in a while, usually at higher volumes.”
Check your voltage source and grounding point. The power supply
PGUIF9%WXJMMPQFSBUFXJUIDIBSHJOHTZTUFN
WPMUBHFTEPXOUP74IVUEPXOQSPCMFNTBUIJHIFSWPMVNF
levels can occur when the charging system voltage (or remote
UVSOPOWPMUBHFESPQTCFMPX75IFTFEJQTDBOCFPGWFSZ
short duration making them extremely difficult to detect
XJUIBDPNNPO%$WPMUNFUFS5PFOTVSFQSPQFSWPMUBHF
inspect all wiring and termination points. It may also be
necessary to upgrade the ground wire connecting the battery
to the vehicle’s chassis and the power wire connecting the
BMUFSOBUPSUPUIFCBUUFSZ.BOZWFIJDMFTFNQMPZTNBMM
AWG - 6 AWG) wire to ground the battery to the vehicle’s
chassis and to connect the alternator to the battery. To prevent
voltage drops, these wires should be upgraded to 4 AWG
when installing amplifier systems with main fuse ratings
BCPWF"(SPVOEJOHQSPCMFNTBSFUIFMFBEJOHDBVTFPG
NJTEJBHOPTFEBNQMJGJFSiGBJMVSFTw
“My amplifier turns on, but there is no output.”
Check the input signal using an AC voltmeter to measure the
voltage from the source unit while an appropriate test tone is
played through the source unit (disconnect the input cables
from the amplifier prior to this test). The frequency used
should be in the range that is to be amplified by the amplifier
FYBNQMF)[GPSBTVCCBTTBQQMJDBUJPOPSL)[GPSBGVMM
range / high-pass application). A steady, sufficient voltage
CFUXFFOBOEWPMUTTIPVMECFQSFTFOUBUUIFPVUQVUPG
the signal cables.
Check the output of the amplifier. Using the procedure explained in
the previous check item (after plugging the input cables back
into the amplifier) test for output at the speaker outputs of
the amplifier. Unless you enjoy test tones at high levels, it is
a good idea to remove the speaker wires from the amplifier
while doing this. Turn the volume up approximately
halfway. 5 volt AC or more should be measured at the
speaker outputs. This output level can vary greatly between
amplifiers but it should not be in the millivolt range with
the source unit at half volume. If you are reading sufficient
voltage, check your speaker connections as explained below.
Check to ensure that the speaker wires are making a good
connection with the metal inside the terminal block. The
speaker wire connectors are designed to accept up to 8 AWG
wire. Make sure to strip the wire to allow for a sufficient
connection with the metal inside the terminal block.
“How do I properly set the input sensitivity on my amplifier?”
Please refer to Appendix A (page 12) to set the input sensitivity for
maximum, low-distortion output.
“My amplifier doesn’t turn on.”
Check the fuse, not just visually, but with a continuity meter. It is
possible for a fuse to have poor internal connections that
cannot be found by visual inspection. It is best to take the
fuse out of the holder for testing. If no problem is found with
the fuse, inspect the fuse holder.
Check the integrity of the connections made to each of the
i+12VDC,wiGround,wBOEiRemotewUFSNJOBMT. Ensure
that no wire insulation is pinched by the terminal set screw
and that each connection is tight.
Check to make sure there is +12V at the iRemotewconnection of the
amplifier. In some cases, the turn-on lead from the source unit
is insufficient to turn on multiple devices and the use of a relay
is required. To test for this problem, jump the i+12VDCwwire
to the iRemotewterminal to see if the amplifier turns on.
“I hear a repetitive ticking or popping sound coming out of the speaker(s).”
Check the speaker wires for a possible short, either between the
positive and negative leads or between either speaker lead
and the vehicle’s chassis ground. If a short is present, you will
experience distorted and/or attenuated output. The iStatus
LEDwwill turn amber in this situation. It may be helpful to
disconnect the speaker wires from the amplifier and use a
different set of wires connected to a test speaker.
Check the nominal load impedance to verify that the amplifier is
driving a load equal to or greater than 2 ohms.
“My amplifier’s output fluctuates when I tap on it or hit a bump.”
Check the connections to the amplifier. Make sure that the
insulation for all wires has been stripped back far enough to
allow for a good contact area inside the terminal block.
Check the input connectors to ensure that they all are making good
contact with the input jacks on the amplifier.
APPENDIX D: TROUBLESHOOTING

16 | JL Audio - XD1200/1v2 Owner’s Manual 17
ENGLISH
INSTALLATION NOTES:
Use this diagram to document your amplifier’s switch and control positions.

LIMITED WARRANTY  AMPLIFIERS USA
+-"6%*0XBSSBOUTUIJTQSPEVDUUPCFGSFFPGEFGFDUTJONBUFSJBMTBOEXPSLNBOTIJQGPSB
period of two (2) years. The warranty is extended to three (3) years total if installation is performed by an
BVUIPSJ[FE+-"VEJPEFBMFSVTJOHB+-"VEJP1SFNJVN1PXFS$POOFDUJPO4ZTUFNGPSQPXFSXJSJOH
This warranty is not transferrable and applies only to the original purchaser from an authorized
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accident, misuse, abuse, product modification or neglect, failure to follow installation instructions,
unauthorized repair attempts, misrepresentations by the seller. This warranty does not cover incidental
or consequential damages and does not cover the cost of removing or reinstalling the unit(s). Cosmetic
damage due to accident or normal wear and tear is not covered under warranty.
Warranty is void if the product’s serial number has been removed or defaced.
Any applicable implied warranties are limited in duration to the period of the express warranty as
provided herein beginning with the date of the original purchase at retail, and no warranties, whether
express or implied, shall apply to this product thereafter. Some states do not allow limitations on implied
warranties, therefore these exclusions may not apply to you. This warranty gives you specific legal rights,
and you may also have other rights which vary from state to state.
If you need service on your JL AUDIO product:
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Warranty expiration on products returned without proof of purchase will be determined from the
manufacturing date code. Coverage may be invalidated as this date is previous to purchase date. Non-
defective items received will be returned freight-collect. Customer is responsible for shipping charges and
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For Service Information in the U.S.A. please call
JL Audio Customer Service: [phone]
9:00 AM – 5:30 PM (Eastern Time Zone)
JL Audio, Inc
10369 North Commerce Pkwy.
Miramar, FL 33025
(do not send product for repair to this address)
International Warranties:
Products purchased outside the United States of America are covered only
by that country’s distributor and not by JL Audio, Inc.
Printed in China XD1000/1v2 MAN-01-30-2013