JL Audio XD600/1v2 Owner's Manual
OWNER’S MANUAL
600W Monoblock Subwoofer Amplier
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 (954) 443–1100 during business hours.
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 amplif iers are capable of producing
such high sound pressure levels when connected
to a speaker system. Please limit your continuous
exposure to high volume levels.
While driving, operate your audio system in
a manner that still allows you to hear necessar y
noises to operate your vehicle safely (horns,
sirens, etc.).
SERIAL NUMBER
In the event that your amplif ier requires
service or is ever stolen, you will need to have
a record of the product’s serial number. Please
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
th e w arra nty.
This product is not certified or approved for
use in aircraft.
Do not attempt to “ bridge” the outputs of this
amplifier with the outputs of a second amplifier,
including an identical one.
2 | JL Audio - XD600/1v2 Owner’s Manual
Input
Voltage
(pg. 7)
Infrasonic
Filter
Selection
(pg. 9)
Turn-On
Mode
(pg. 6)
Status
LED
(pg. 11)
LP Filter
Mode/Slope
Selection
(pg. 8)
Input Sensitivity
Control
(pg. 7)
Filter
Frequency
Selector
(pg. 8)
PLANNING YOUR INSTALLATION
It is important that you take the time to
read this manua l and that you plan out your
installation carefully. The following are some
considerations that you must take into account
when planning your installation.
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
• 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.
• Do not run system wiring outside or underneath
the vehicle. This is an extremely dangerous
practice which can result in severe damage to
your vehicle and person.
• Protect all system wires from sharp metal edges
and wear by carefully routing them, tying
them down and using grommets and loom
where appropriate.
• Do not mount the amplifier in the engine
compartment, under the vehicle, on the roof or
in any other area that will expose the amplifier
circuitry to the elements.
Chassis Ground
Connector
(pg. 5)
+12 V Power
Connector
(pg. 5)
+12 VDC Ground Remote
Remote Turn-On
Preamp Input Jacks
Connector
(pg. 6)
Left & Right
(pg. 7)
Preamp Output Jacks
Left & Right
(pg. 10)
Jack for
Remote Level
Control Knob
(pg. 9)
Remote
Level
Control
Mono
Subwoofer Outputs
(pg. 10)
Mono Subwoofer Output
3
PRODUCT DESCRIPTION
The XD600/1v2 is a monoblock
amplifier utilizing JL Audio NexD™ high speed
switching technology to deliver outstanding
fidelity and efficiency.
The XD600/1v2 can be operated with a wide
variety of source units and system configurations.
Its frequency response is limited to the range
below 500 Hz. It is not designed for driving
midrange speakers or tweeters. Every aspect of its
operation has been optimized for low-frequency
amplification. For detailed specif ications, 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).
Additiona l 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) Disconnect the negative battery post
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 4 AWG or larger power
wire and a fused power distribution block if
additional amplifiers are being installed with
the X D60 0/1v2 .
3) Connect the 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 (90 cm)
from the amplif ier to the ground connection
point. In some vehicles, it may be necessar y 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 amplifier is not necessary if
the XD600/1v2 is the only device being
run from the fused main power wire.
If the fused main power wire is shared
by the XD600/1v2 and other amplifiers
or devices, fuse each amplifier/device
within 12 inches (30 cm) of wire length,
via a fused distribution block or multiple
individual fuse blocks/on-board fuses.
9) Connect the remote turn-on wire to the
amplifier or configure the “Turn-On Mode”
switch for automatic turn-on.
10) Connect the input cables to the amplifier.
11) Connect the spea ker 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.
13) Install the power wire fuse (50A for a single
XD600/1v2) and reconnect the negative
battery post termina l. Install the fuse (50A)
near the amplifier (if applicable).
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 verif ied 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.
4 | JL Audio - XD600/1v2 Owner’s Manual
POWER CONNECTIONS
Remote
Level
Control
Mono Subwoofer Output
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.
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.
+12 VDC Ground Remote
The XD600/1’s “+12 VDC ” and “Ground”
connections are designed to accept 4 AWG
power wire. 4 AWG is the required wire size for
this amplifier.
If you are installing the XD600/1v2 with other
amplifiers and wish to use a single main power
wire, use 2 AWG or 1/0 AWG main power wire
(depending on the overall current demands of
all the amplifiers in the system). This 2 AWG
or 1/0 AWG power wire should terminate into a
fused distribution block mounted as close to the
amplifiers as possible (within 12 inches / 30cm of
wire length). The fused output of the distribution
block will connect to the XD600/1v2 with
4 AWG power wire. JL Audio ECS fused
distribution blocks are recommended
(XD-FDBU–2 and XD-FDBU–4).
Note: Smaller AWG numbers mean bigger wire
and vice-versa (1/0 AWG is the largest, 2 AWG is
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 f irmly 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.
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
only the X D600/1v2 is being run from that power
wire, use a 50A fuse.
If fusing the amplifier near its power
connections (when more than one amp is being
run from the main power wire), use a 50A fuse
(MAXI™ big plastic-body fuse is recommended).
5
TURNON OPTIONS
Remote
Level
Control
Mono Subwoofer Output
The XD600/1v2 can be switched on and off
using one of three methods, determined by the
position of the amplifier’s “Turn-On Mode”
switch. Please read these options and decide
which is best suited for your specific system.
1) +12V remote turn-on lead
2) Signal-sensing turn-on circuit.
3) DC offset-sensing turn-on circuit
+12 V Remote Turn-On: This is the preferred
method for turning the amplif ier on/off. The
amplifier will turn on when +12 V is present at
its “Remote” input and turn off when +12 V is
switched off. This +12 V remote turn-on signal
is typically controlled by a source unit’s remote
turn-on wire. The XD600/1v2’s “Remote” turnon connector will accept 18 AWG – 12 AWG
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.
audio systems that do not use conventional +12 V
turn-on leads.
Depending on the characteristics of the audio
signal, one of the following methods may work
better than the other. We recommend trying DC
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
DC signal (offset) that is typical in the audio
output of most OEM (factory) source units and
amplifiers. The amplifier will turn on and off in
reaction to the presence or absence of this DC
Offset. The sensitivity of this circuit is designed
for high-level (speaker level) signals, not for lowlevel (preamp level) signals. The circuit senses
the left-channel signal only.
Signal-Sensing: The amplif ier will turn on
and off by detecting the presence of a full-range
audio signal at its left-channel input. After
approximately 30 seconds, the amplifier will shut
off. The sensitiv ity 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.
+12 VDC Ground Remote
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)
6 | JL Audio - XD600/1v2 Owner’s Manual
In signal sensing and DC offset sensing
applications, the amplifier’s “Remote” turn-on
terminal becomes a remote turn-on output.
This allows the XD600/1v2 to turn on other
amplifiers in the audio system that do not have
signal sensing or DC offset sensing. Of course,
the XD600/1v2 must be the first amplifier in the
signal path for this to function properly.
INPUT SECTION
The XD600/1v2 employs a differentialbalanced input topology that provides the user
with a high degree of input f lexibility, while
retaining superior noise rejection. This type of
circuit also allows the XD600/1v2 to accept highvoltage inputs from factory source unit outputs
without excessive distortion or noise problems.
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