JL Audio E6450 User Manual

JL AUDIO e6450  
six-channel full-range amplifier  
o w n e r ’ s m a n u a l  
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 and extended warranty  
coverage, 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 so as 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 (Eastern Time Zone).  
PRODUCT DESCRIPTION  
FUSE REQUIREMENTS  
The JL Audio e6450 is a six-channel full-range  
amplifier utilizing patented Absolute Symmetry™  
Class AB technology for all channels.  
The e6450 can be operated with a wide variety  
of source units and system configurations.  
7) Securely mount the amplifier using the  
supplied screws.  
8) Connect the positive and negative power  
wires to the amplifier.A fuse near the amplifier is  
not necessary.  
The e6450's “+12VDC” and “Ground”  
connections are designed to accept 4 AWG  
power wire. 4 AWG is a minimum power  
wire size for this amplifier.  
If you are installing the e6450 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  
distribution block mounted as close to the  
amplifiers as possible and should connect to the  
e6450 with 4 AWGpower wire.  
Please note that 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 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  
the same gauge wire as the power connection  
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.The use of a star washer to lock  
down the connection is advisable.  
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.  
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  
e6450 is being run from that power wire, we  
recommend a 60A fuse be used. AGU (big glass  
fuse) or MaxiFuse™ (big plastic-body fuse) types  
are recommended.  
9) Connect the remote turn-on wire  
to the amplifier.  
TYPICAL INSTALLATION SEQUENCE  
The following represents the sequence for a  
typical amplifier installation, using an aftermarket  
source unit. Additional steps and different  
procedures may be required in some applications. If  
you have any questions, please contact your  
authorized JLAudio dealer for assistance.  
10) Connect the input cables to the amplifier.  
11) Connect the speaker wires 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 (60A for a  
single e6450) and reconnect the negative  
battery post terminal.  
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.  
No fuse is required or recommended directly  
before the amplifier power connection. If one is  
desired, we recommend the use of a 60A AGU fuse  
or MaxiFuse™ type.  
1) Disconnect the negative battery post  
connection and secure the disconnected cable to  
prevent accidental re-connection during installation.  
This step is not optional!  
2) Run power wire (minimum 4 AWG) 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 1/0 AWG  
power wire if additional amplifiers are being  
installed with the e6450.  
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 connected to  
the amplifier.  
4) Run signal cables and remote turn-on wire  
from the source unit to the amplifier  
mounting location.  
5) Run speaker wire 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 the same  
size power wire as the wire connected to the  
“+12V” connection (minimum 4 AWG), no longer  
than 36 inches (90 cm) from the amplifier to the  
ground connection point. In some vehicles, it may be  
necessary to upgrade the battery ground wire.  
(See page 5 for important notice).  
TURN-ON LEAD  
The e6450 uses a conventional +12V remote  
turn-on lead, typically controlled by the source unit's  
remote turn-on output.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.  
The e6450's “Remote” turn-on connector is  
designed to 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 2.5mm 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.  
16) Enjoy the fruits of your labor with your  
favorite music.  
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.  
IMPORTANT  
!
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.  
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JL AUDIO e6450  
JL AUDIO e6450  
5
INPUT SECTION  
AMPLIFIER CONTROLS  
The e6450’s input section allows you to send  
signal to the amplifier section through the use of  
two, four or six inputs and offers two distinct input  
connection options.These are:  
1)Three pairs of traditional RCA type  
connections designed to accept input from source  
units with line level outputs.  
2) An eight-pin connector designed to accept  
input from amplified sources such as factory source  
units or source units not equipped with line level  
outputs. Channels 5 & 6 of the e6450 do not have  
discrete inputs on this connector. However, signal  
from channels 1 & 2 and channels 3 & 4 can be  
summed and sent to channels 5 & 6 when “SUM” is  
selected with the “Input Mode” switch in the  
Channel 5 & 6 Controls section.  
y-adaptors and feed these signals into the inputs to  
channels 1, 2, 3 & 4.The dedicated subwoofer signal  
should be sent to channels 5 & 6.  
If you wish to use only two channels of input to  
deliver signal to all six amplifier channels, it will be  
necessary to split the two signals with y-adaptors  
and feed these signals into the inputs to channels  
1, 2, 3 & 4. Set the “Input Mode” switch in the  
“Channel 5 & 6 Controls” section to “SUM” and  
use only the inputs to channels 1, 2, 3 & 4.  
The same input connection option does not  
need to be used for each channel pair.The “Input  
Sens.adjustment is independent for each channel  
pair and must be adjusted based on input level and  
the impedance of the load on that pair of channels.  
Specific “Input Sens.adjustment information is  
given in Appendix A (page 12).  
Input Sensitivity  
These controls, labeled “Input Sens.,can be  
used to match the source unit's output voltage(s)  
to each input stage of the e6450 for maximum  
clean output. Rotating an “Input Sens.control  
clockwise will result in higher sensitivity (louder for  
a given input voltage). Rotating an “Input Sens.”  
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, you can then  
adjust any or all “Input Sens.levels 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.  
1) “Filter Mode” Control:The e6450 employs a  
12dB per octave filter for each pair of channels (one  
filter for channels 1&2, another filter for channels  
3&4 and another filter for channels 5&6). Each of  
these filters can be configured independently into  
one of two filter types or defeated completely by  
way of the three-position “Filter Mode” switches:  
“Off”: Defeats the filter completely, allowing the full  
range of frequencies present at the inputs to feed  
the amplifier.This is useful for systems utilizing  
outboard crossovers or requiring full-range  
reproduction from one, two or all of the e6450’s  
channel pairs.  
“LP” (Low-Pass): Configures the filter to attenuate  
frequencies above the selected filter frequency at a  
rate of 12dB per octave.This is useful for  
connection of subwoofer(s) to one, two or all of  
the e6450’s channel pairs in a bi-amplified system.  
“HP” (High-Pass): Configures the filter to attenuate  
frequencies below the selected filter frequency at a  
rate of 12dB per octave.This is useful for  
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 mids 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 filter built into each channel of the  
e6450 can be used to eliminate potentially harmful  
and/or undesired frequencies from making their way  
through the amplifier sections to the speaker(s).This  
serves to improve tonal balance and to avoid  
distortion and possible speaker failure. Correct use  
of these filters can substantially increase the  
longevity and fidelity of your audio system.  
If you wish to send six discrete channels into the  
e6450, simply use all six inputs and set the “Input  
Mode” switch in the “Channel 5 & 6 Controls”  
section to “Discrete”.This will most commonly be  
accomplished by using the six RCA type connections  
(it is possible to use the eight-pin connector with  
amplified signals for input into channels 1, 2, 3 & 4  
and RCA type connections for input into channels 5  
& 6, however, most source units with a dedicated  
subwoofer output will also have at least one pair of  
full range outputs).  
If you wish to feed all six channels by using only  
four channels of full-range input, set the “Input  
Mode” switch in the “Channel 5 & 6 Controls”  
section to “SUM” and use only the inputs to  
channels 1, 2, 3 & 4.  
connection of component speakers to one, two or  
all of the e6450’s channel pairs in a bi-amplified  
system.  
2) “Filter Freq. (Hz)The filter frequency  
markings surrounding this rotary control are for  
reference purposes and are generally accurate to  
within 1/3 octave or better. If you would like to  
select the filter cutoff frequency with a higher level of  
precision, consult the chart in Appendix B (page 13).  
Tuning Hint: If you are using the e6450 to drive a  
subwoofer system (“LP” mode), a component  
satellite speaker system (“HPmode) or both,  
100 Hz is a good baseline “Filter Freq. (Hz)”  
setting. After properly adjusting the “Input Sens.,  
as outlined in Appendix A (page 12), you can fine  
tune the “Filter Freq. (Hz)” control to achieve the  
desired system frequency response.  
If you wish to feed all six channels by using two  
channels of full-range input and two channels of low-  
frequency input (subwoofer output from the source  
unit), set the “Input Mode” switch in the “Channel 5  
& 6 Controls” section to “Discrete”. It will be  
necessary to split the full-range signals with  
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JL AUDIO e6450  
JL AUDIO e6450  
7
BASS BOOST CONTROLS  
only information or the sum of the information  
from both the right and left channels. In order to  
achieve one of these options, configure the inputs  
to that pair of channels in one of these two ways:  
1) Left Channel Only or Right Channel Only  
Information: If you wish to send a Left-only or  
Right-only signal to a pair of the e6450’s channels,  
use a “Y-Adaptor” to split the single channel signal  
into both left and right RCA inputs (or parallel-  
connect both positive and both negative high-level  
input connections to a single channel source signal).  
This option is useful when using one pair of the  
e6450’s channels to drive left channel speakers only  
and another pair of the e6450’s channels to drive  
right channel speakers only.  
1) “Power” (Green): lights to indicate that the  
amplifier is turned on and operating normally.  
2) “Protect” (Red): lights or flashes to indicate  
that the amplifier protection circuitry has been  
activated to prevent product failure.  
a) If the red “Protect” indicator lights steadily  
(without flashing), the amplifier has exceeded its safe  
operating temperature.This causes the amplifier to  
shut off in order to protect its circuitry. When the  
amplifier’s temperature drops to a safe level, the red  
“Protect” indicator will shut off and the amplifier  
will return to normal operation.  
IMPORTANT  
!
Speaker loads below 2nominal per channel  
are not recommended and may cause the amplifier  
to initiate a protection mode and shut itself off.  
BRIDGING CONSIDERATIONS  
Bridging is the practice of combining the output  
of two amplifier channels to drive a single load.  
When bridged, each channel produces signals of  
equal magnitude, but opposite polarity.The  
combined output of the two channels provides  
twice the output voltage available from a single  
channel.The e6450 has been designed for bridging  
of its channel pairs without the need for input  
inversion adaptors.  
To bridge a pair of channels, use the “Left +” and  
“Right –” speaker connectors only (the “Left –”  
and “Right +” remain unused).When bridged, each  
channel will deliver optimum power into a 4load.  
1) Bass Boost (Channels 5&6): This switch  
allows the user to activate a 6 dB boost centered  
at 48 Hz for channels 3&4.When the “Bass Boost”  
in the “Channel 5 & 6 Controls” section is  
activated, the inputs to “CH 5 (Left)” and “CH 6  
(Right)” are summed to create a mono signal. The  
“Filter Mode” switch in the “Channel 5 & 6” section  
must be in the “LP” position for the bass boost to  
be functional.  
2) Remote Bass Port: This port allows you to  
connect an optional remote boost knob (sold  
separately, JL Audio Model RBC-1) that can be  
mounted in the front of the vehicle. With the  
RBC-1 connected, the boost is no longer limited to  
0 or +6 dB, allowing a range of 0 - 12 dB of boost  
to be selected.  
b) If the red “Protect” indicator flashes  
intermittently, the protection circuitry has detected a  
short-circuit or a dangerously low impedance  
connected to the amplifier output(s). Connecting  
the speaker outputs to an impedance lower than  
2stereo (4bridged) will cause this protection  
mode to activate.The amplifier’s output may cycle  
on and off when this protection mode is activated.  
When the problem is eliminated, the amplifier will  
return to normal operation.  
IMPORTANT  
!
When parallel-connecting both positive and both  
negative high-level input connections as described  
above, make sure to connect negative (–) wires to  
negative (–) wires and positive (+) wires to positive  
(+) wires.  
IMPORTANT  
!
When a pair of channels are bridged, they will  
deliver 150W x 1 into a 4load or 90W x 1 into  
an 8load. Operating a pair of bridged channels  
into a load lower than 4is not recommended.  
2) Left + Right Channel Information: When  
bridged and fed by a stereo input, a pair of the  
e6450’s channels will automatically combine the left  
and right channels into a summed mono (left +  
right) channel.This option is useful when using a pair  
of the e6450’s channels to drive a subwoofer  
system or a summed mono center channel.  
SERVICINGYOUR 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 trained service personnel. Do not  
attempt 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.  
Because a bridged pair of channels requires that  
both channels receive input, you need to connect  
both left and right inputs to the source unit.  
Connection of only one input will result in reduced  
power output, increased distortion and can cause  
the amplifier to overheat. Do not do this!  
SPEAKER OUTPUTS  
The e6450’s speaker outputs are designed to  
accept 8 AWG - 16 AWG wire.  
Each pair of the e6450’s channels are designed  
to deliver power into speaker loads equal to or  
greater that 2when using a “stereo” configuration  
and speaker loads equal to or greater than 4Ω  
when using a “bridged” configuration.  
AMPLIFIER STATUS INDICATOR LIGHTS /  
PROTECTION CIRCUITRY  
There are two status indicator lights on the  
input / control end of the amplifier:  
When a pair of the e6450’s channels are  
operating in bridged mode, the output will be in  
mono (only one channel).This mono channel can  
contain right channel only information, left channel  
If you have any questions about the installation or  
setup of the amplifier not covered in  
this manual, please contact your dealer or the  
JL AUDIO Technical Department for assistance:  
(954) 443-1100  
9:00 AM – 5:30 PM Eastern Time,  
Monday – Friday  
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JL AUDIO e6450  
9
SYSTEM CONFIGURATIONS  
The e6450 is a flexible amplifier, well-suited for a  
multitude of system configurations. In this section, the  
most likely configurations are explained in detail.  
Once you have selected your desired  
configuration, you can use the amplifier panel  
drawing on pages 16 & 17 to mark the required  
switch positions for easy reference.  
2 (Right)” inputs and the second pair of stereo  
source unit outputs is connected to the  
“CH 3 (Left)” and “CH 4 (Right)” inputs of the  
e6450 (select “SUM” on the “Input Mode” switch in  
the “Channel 5 & 6 Controls” section).  
Result: the relative level of the LF and HF channels will  
be fixed by the e6450’s “Input Sens.settings and will  
not be user adjustable from the front of the vehicle.  
“CH 2 (Right)” inputs, the second pair of stereo  
source unit outputs is connected to the  
“CH 3 (Left)” and “CH 4 (Right)” inputs and the  
source unit’s dedicated subwoofer output is  
connected to the “CH 5 (Left)” and “CH 6 (Right)”  
inputs (select “Discrete” on the “Input Mode”  
switch in the “Channel 5 & 6 Controls” section).  
Result: in this mode, the user has the ability to  
control the absolute level of the LF channels as well  
as both pairs of HF channels.  
BI-AMPLIFIED SYSTEMS  
Bi-amplified systems are defined as systems in  
which separate amplifier channels drive low-frequency  
(LF)and high-frequency (HF) speakers and are  
separately filtered to send appropriate frequency  
ranges to each speaker system.  
The most common application of bi-amplification  
in mobile audio is to drive a subwoofer system from  
one or more amplifiers or channels and component  
speakers from separate amplifiers or channels.  
The e6450 is designed to work as the only  
amplifier in a bi-amplified system.  
C) Fade Subwoofer Level vs. HF Level  
Required: a basic source unit or processor with two  
pairs of stereo outputs.  
IMPORTANT  
!
Input Connections: the first stereo pair of source  
unit outputs each split with a “Y-Adaptor” allowing  
the left signal to be sent to the “CH 1 (Left)” and  
“CH 3 (Left)” inputs and the right signal to be sent  
to the “CH 2 (Right)” and “CH 4 (Right)” inputs  
of the e6450.The second stereo pair of source unit  
outputs is connected to the “CH 5 (Left)” and  
“CH 6 (Right)” inputs (select “Discrete” on the  
“Input Mode” switch in the “Channel 5 & 6  
Controls” section).  
Result: in this mode, the user has the ability to fade  
or control the level of the LF channels relative to  
the HF channels via the source unit’s fader control  
without exceeding the maximum clean output level  
set by each amplifier section’s “Input Sens.controls.  
D) Subwoofer Level Control Only  
Required: a source unit or processor with one pair of  
stereo outputs and dedicated subwoofer outputs.  
Input Connections: the stereo pair of source unit  
outputs each split with a “Y-Adaptor” allowing the  
left signal to be sent to the “CH 1 (Left)” and “CH  
3 (Left)” inputs and the right signal to be sent to the  
“CH 2 (Right)” and “CH 4 (Right)” inputs of the  
e6450.The source unit’s dedicated subwoofer  
outputs are connected to the “CH 5 (Left)” and  
“CH 6 (Right)” inputs (select “Discrete” on the  
“Input Mode” switch in the “Channel 5 & 6  
Controls” section).  
When using a source unit’s dedicated subwoofer  
output, set the “Input Sens.of any channels  
receiving input from the subwoofer output with the  
source unit’s subwoofer level control set at 3/4 of full  
output. See Appendix A (page 12) for details.  
Crossover Setup for Bi-Amplified System  
with one e6450:  
Once the input sections have been configured  
appropriately, go to the “Channel 5 & 6 Controls”.  
Select “LP” (low-pass) on the “Filter Mode” switch  
and an appropriate “Filter Freq.(100 Hz is a good  
starting point).  
Next, turn your attention to the “Channel 1 & 2  
Controls” and “Channel 3 & 4 Controls” and  
select “HP” (high-pass) on the “Filter Mode”  
switches and an appropriate “Filter Freq.(again,  
100 Hz is a good starting point).  
After proper adjustment of the “Input Sens.”  
controls for all three channel pairs using the method  
shown in Appendix A (page 12), you can fine tune  
filter frequencies and attenuate any pair of channels  
to achieve proper balance. For precise filter frequency  
information refer to Appendix B (page 13).  
BI-AMPLIFIED SYSTEMWITHTHE e6450  
In this configuration, channels 5&6 of the e6450 will  
drive subwoofers (stereo 75W x 2 at 2or bridged  
150W x 1 at 4) with low-pass filtering. Channels  
1&2 and channels 3&4 will drive component speakers  
in stereo (75W x 4 at 2) with high-pass filtering.  
Input connection options for a bi-amplified system with  
one e6450 are as follows:  
A) No User Adjustability  
Required: a basic source unit or processor with a  
single pair of stereo outputs.  
Input Connections: a single pair of stereo source  
unit outputs each split with a “Y-Adaptor” allowing  
the left signal to be sent to the “CH 1 (Left)” and  
“CH 3 (Left)” inputs and the right signal to be sent  
to the “CH 2 (Right)” and “CH 4 (Right)” inputs  
of the e6450 (select “SUM” on the “Input Mode”  
switch in the “Channel 5 & 6 Controls” section).  
Result: the relative level of the LF and HF channels will  
be fixed by the e6450’s “Input Sens.settings and will  
not be user adjustable from the front of the vehicle.  
B) Fade Front vs. Rear with no Subwoofer  
Level Control  
Result: in this mode, the user has the ability to  
control the absolute level of the LF channels relative  
to the HF channels.  
E) Independent level control of all three  
channel pairs  
Required: a basic source unit or processor with two  
pairs of stereo outputs.  
Input Connections: one pair of stereo source unit  
outputs is connected to the “CH 1 (Left)” and “CH  
Required: a source unit or processor with two pairs  
of stereo outputs and dedicated subwoofer outputs.  
Input Connections: one pair of stereo source unit  
outputs is connected to the “CH 1 (Left)” and  
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JL AUDIO e6450  
JL AUDIO e6450  
11  
APPENDIX A:  
APPENDIX B:  
APPENDIX C:  
Input Sensitivity Level Setting  
Precise Frequency Selection Chart  
e6450 Specifications  
“FILTER FREQ” AMP FILTER  
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.  
9) Once you have adjusted the e6450 to its  
maximum low-distortion output level, reconnect  
the speaker(s).The “Input Sens.controls can now  
be adjusted downward if the amplifier requires  
attenuation to achieve the desired system balance.  
GENERAL SPECIFICATIONS:  
Recommended FuseValue: 60A  
Detent  
Number  
Panel  
Marking  
Actual  
Freq.  
Recommended Fuse Type: AGU or MaxiFuse™  
Full counter-clockwise: 53  
01 . . . . . . . . . . . . . . . . . . . . . . . .53  
02 . . . . . . . . .“50” . . . . . . . . .53  
03 . . . . . . . . . . . . . . . . . . . . . . . .53  
04 . . . . . . . . . . . . . . . . . . . . . . . .54  
05 . . . . . . . . . . . . . . . . . . . . . . . .54  
06 . . . . . . . . . . . . . . . . . . . . . . . .55  
07 . . . . . . . . . . . . . . . . . . . . . . . .55  
08 . . . . . . . . .“55” . . . . . . . . .56  
09 . . . . . . . . . . . . . . . . . . . . . . . .56  
10 . . . . . . . . . . . . . . . . . . . . . . . .57  
11 . . . . . . . . . . . . . . . . . . . . . . . .58  
12 . . . . . . . . . . . . . . . . . . . . . . . .59  
13 . . . . . . . . . . . . . . . . . . . . . . . .62  
14 . . . . . . . . .“60” . . . . . . . . .65  
15 . . . . . . . . . . . . . . . . . . . . . . . .65  
16 . . . . . . . . . . . . . . . . . . . . . . . .66  
17 . . . . . . . . . . . . . . . . . . . . . . . .70  
18 . . . . . . . . . . . . . . . . . . . . . . . .73  
19 . . . . . . . . . . . . . . . . . . . . . . . .77  
20 . . . . . . . . .“80” . . . . . . . . .81  
21 . . . . . . . . . . . . . . . . . . . . . . . .84  
22 . . . . . . . . . . . . . . . . . . . . . . . .88  
23 . . . . . . . . . . . . . . . . . . . . . . . .94  
24 . . . . . . . . . . . . . . . . . . . . . . .101  
25 . . . . . . . . . . . . . . . . . . . . . . .104  
26 . . . . . . . . .“120” . . . . . . . .115  
27 . . . . . . . . . . . . . . . . . . . . . . .118  
28 . . . . . . . . . . . . . . . . . . . . . . .128  
29 . . . . . . . . . . . . . . . . . . . . . . .137  
30 . . . . . . . . . . . . . . . . . . . . . . .146  
31 . . . . . . . . . . . . . . . . . . . . . . .164  
32 . . . . . . . . .“150” . . . . . . . .177  
33 . . . . . . . . . . . . . . . . . . . . . . .193  
34 . . . . . . . . . . . . . . . . . . . . . . .197  
35 . . . . . . . . . . . . . . . . . . . . . . .209  
36 . . . . . . . . . . . . . . . . . . . . . . .213  
37 . . . . . . . . . . . . . . . . . . . . . . .216  
38 . . . . . . . . .“200” . . . . . . . .218  
39 . . . . . . . . . . . . . . . . . . . . . . .225  
Full-clockwise: 225  
INPUT SECTIONS:  
No. of Inputs: Three Stereo Pairs  
Input Type: Differential, noise-cancelling with RCA jack  
inputs (low-level, three pairs) and multi-pin jack  
(high-level, two pairs)  
Necessary Equipment  
• Digital ACVoltmeter  
IMPORTANT  
!
• CD with a sine-wave test tone recorded at 0 dB  
reference level in the frequency range to be  
amplified for that set of channels (50 Hz for  
subwoofer channels, 1 kHz for a midrange  
application). Do not use attenuated test tones  
(-10 dB, -20 dB, etc.).  
Do not increase any “Input Sens.setting 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  
“Input Sens.for the affected channels if any  
equalizer boost is activated after setting the  
“Input Sens.with this procedure.This applies to  
any EQ boost circuit, including source unit tone  
controls or EQ circuits. EQ cuts will not require  
re-adjustment.  
Input Range: 200mV - 8V RMS  
AMPLIFIER SECTION:  
Amplifier Topology: Class AB with patented Absolute  
Symmetry™ dual N-Channel MOSFET output design  
Power Supply: Unregulated MOSFET switching type  
Rated Power (Stereo):  
The Nine-Step Procedure  
1) Disconnect the speaker(s) from the  
amplifier’s speaker output connectors.  
45W RMS x 6 @ 4(12.5V)  
75W RMS x 6 @ 2(12.5V)  
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 maximum (if  
used to feed the e6450).  
3)Turn the “Input Sens.control 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 before proceeding. Play a track with an  
appropriate sine wave (within the frequency range  
to be amplified by the e6450) at 3/4 source  
unit volume.  
7) Connect the AC voltmeter to the speaker  
output connectors of the amplifier. If the channel  
pair is operating in stereo, it is only necessary to  
measure one channel. If bridged, make sure you test  
the voltage at the correct connectors (L+ and R–).  
8) Increase the “Input Sens.control until the  
target voltage is observed with the voltmeter.  
Rated Power (Bridged):  
90W RMS x 3 @ 8(12.5V)  
150W RMS x 3 @ 4(12.5V)  
THD at Rated Power: <0.08% @ 4 ohms per channel  
(20 Hz - 20 kHz)  
Nom.  
Target ACVoltage  
Impedance Stereo  
Bridged  
Signal to Noise Ratio: >104 dB referred to rated power  
(A-weighted, 20 Hz-20 kHz noise bandwidth)  
Frequency Response: 10 Hz - 25 kHz (+0, -1dB)  
Damping Factor: >200 @ 4per ch./50 Hz,  
>100 @ 2per ch. /50 Hz  
8Ω  
6Ω  
4Ω  
3Ω  
2Ω  
13.4V  
13.4V  
13.4V  
12.8V  
12.3V  
26.8V  
25.6V  
24.6V  
not recommended  
not recommended  
Slew Rate: 22V/µs  
AMPLIFIER FILTER:  
Filter Type: State-variable, 12dB/octave Butterworth with  
continuously variable cutoff frequency selection from  
50-200 Hz. Configurable as Low-Pass or High-Pass.  
Defeatable.  
DIMENSIONS (LxWxH):  
17.7" x 9.25" x 2.36" (450mm x 235mm x 60mm)  
Due to ongoing product development, all specifications are  
subject to change without notice.  
12  
JL AUDIO e6450  
JL AUDIO e6450  
13  
APPENDIX D: TROUBLE SHOOTING  
MY AMPLIFIER DOESNTTURN ON”  
MY AMPLIFIERTURNS ON, BUTTHERE IS NO OUTPUT”  
Check the input signal using an AC voltmeter to measure the voltage  
Check to make sure there is +12V at the “Remote” connection 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 “+12V”  
wire to the “Remote” terminal to see if the amplifier turns on.  
If this does not work, proceed to the next step.  
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  
(example: 50 Hz for a sub bass application or 1 kHz for a full  
range / high-pass application). A steady, sufficient voltage  
(between 0.2 and 8.0-volts) should be present at the output of  
the signal cables.  
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 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 half way.  
5V 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.  
I GET A DISTORTED / ATTENUATED SOUND COMING OUT OFTHE 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 “Protect”  
light may also illuminate 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 each channel  
of the amplifier is driving a load equal to or greater than  
2(4bridged).  
Check the input signal and input signal cables to make sure signal is  
present at the “Amplifier Inputs” and the cables are not  
pinched or loose. It may be helpful to try a different set of  
cables and/or a different signal source to be sure.  
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 12  
AWG wire. Make sure to strip the wire to allow for a  
sufficient connection with the metal inside the terminal block.  
MY AMPLIFIERS OUTPUT FLUCTUATES WHEN ITAP 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 a  
MY AMPLIFIER SHUTS OFF ONCE IN A WHILE, USUALLY AT HIGHERVOLUMES”  
Check your voltage source and grounding point.The power supply of  
the e6450 will operate with charging system voltages down to  
8V. Shutdown problems at higher volume levels can occur  
when the charging system voltage drops below 8V.These dips  
can be of very short duration making them extremely difficult  
to detect with a common DC voltmeter.To ensure proper  
voltage, 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  
alternator to the battery. Many vehicles employ small  
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.  
HOW DO I PROPERLY SETTHE INPUT SENSITIVITY ON MY AMPLIFIER”  
Please refer to Appendix A (page 12) to set the input sensitivity for  
maximum, low-distortion output.  
(10 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 above  
60A. Grounding problems are the leading cause of  
mis-diagnosed amplifier failures.  
14  
JL AUDIO e6450  
JL AUDIO e6450  
15  
INSTALLATION NOTES:  
Use this diagram to document your amplifier’s switch and control positions.  
16  
JL AUDIO e6450  
JL AUDIO e6450  
17  
18  
JL AUDIO e6450  
JL AUDIO e6450  
19  
LIMITEDWARRANTY - AMPLIFIERS (USA)  
JL AUDIO warrants this product to be free of defects in materials and workmanship for a period of ninety  
(90) days from the original date of purchase.The warranty term is extended to two (2) years if installation is  
performed or approved by an authorized JL AUDIO dealer (proof of installation or approval required on  
purchase receipt).  
This warranty is not transferrable and applies only to the original purchaser from an authorized JL AUDIO  
dealer. Should service be necessary under this warranty for any reason due to manufacturing defect or  
malfunction, JL AUDIO will (at its discretion), repair or replace the defective product with new or remanufactured  
product at no charge. Damage caused by the following is not covered under warranty: 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 products 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:  
All warranty returns should be sent to JL AUDIO ’s Amplifier Service Facility freight-prepaid through an  
authorized JL AUDIO dealer and must be accompanied by proof of purchase (a copy of the original sales receipt).  
Direct returns from consumers or non-authorized dealers will be refused unless specifically authorized by  
JL AUDIO with a valid return authorization number.  
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 insurance in  
sending the product to JL AUDIO. Freight damage on returns is not covered under warranty.  
For Service Information in the U.S.A. please call:  
JL Audio customer service: (954) 443-1100  
during normal business hours (9:00 AM – 5:30 PM Eastern Time)  
JL Audio, Inc  
10369 North Commerce Pkwy.  
Miramar, FL 33025  
(do not send product for repair to this address)  
InternationalWarranties:  
Products purchased outside the United States of America are covered only  
by that country’s distributor and not by JL Audio, Inc.  
Absolute Symmetry Class AB Amplifier Circuit is covered by U.S. Patent #6,294,959 and is  
pending in the countries listed below. Austria,Belgium,Brazil,Canada,China,France,Germany,Indonesia,  
Italy, Japan, Republic of Korea, Mexico, Netherlands, Norway, Russian Federation, Singapore, Sweden,  
Switzerland, United Kingdom, and all other PCT countries.  
e6450MAN-CH-03-2003  

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