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JL Audio

 

 

 

 

9

PreamP outPuts

The J2-360.2 incorporates a pass-through 

preamp output section, so that additional 
amplifiers can be easily added to the system. This 
pass-through pre-amp output delivers the same 
signals that are fed into the amplifier's inputs.

Filter Frequency (Hz)

Input Sens.

Bass Boost

min max

50

500

Off +9dB

Power

Protect

LEFT

RIGHT

LEFT

RIGHT

Preamp

Outputs

Amplifier

Inputs

HP | Off | LP

Filter Mode

High-Level Inputs

 

 

The preamp output signal is not affected by the 

Bass Boost

 

processing selected for the amplifier 

or by any crossover filter selected (if the input 
signal is full-range, the preamp output will be 
full-range). 

 

Note:

 The signal level of the “

Preamp Output

 

is 

always line-level (low voltage).

sPeaker outPuts

The J2-360.2’s speaker outputs are designed to 

accept 16 AWG - 8 AWG wire. 

Made in China

LEFT CHANNEL

RIGHT CHANNEL

Bridged

FUSES

Ground

20A

20A

Remote

+ 12VDC

J2-360.2 is designed to deliver power into 

speaker loads equal to or greater than 2 ohms per 
channel when using a “stereo” configuration and 
speaker loads equal to or greater than 4 ohms 
when using a “bridged” configuration.

 

IMPORTANT

!

 

Speaker loads below 2 ohms nominal per 

channel are not recommended and may cause 

the amplifier to initiate a protection mode.

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 J2-360.2 has been designed 
for bridging of its channels 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, the amplifier will deliver 
optimum power into a 4 ohm load. 

Filter Controls

The active filter built into the J2-360.2 can 

be used to eliminate potentially harmful and/
or undesired frequencies from making their way 
through the amplifier section to the speaker(s). 
This serves to improve tonal balance and to avoid 
distortion and possible speaker failure. Correct 
use of this filter can substantially increase the 
longevity and fidelity of your audio system.

Filter Frequency (Hz)

Input Sens.

Bass Boost

min max

50

500

Off +9dB

Power

Protect

LEFT

RIGHT

LEFT

RIGHT

Preamp

Outputs

Amplifier

Inputs

HP | Off | LP

Filter Mode

High-Level Inputs

 

1)  

“Filter Mode” Control

: The J2-360.2 employs 

a 12dB per octave filter. This filter can be 
configured into one of two filter types or 
defeated completely by way of the three-
position

 

Filter Mode

” switch: 

 

“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 connection of component speakers 
the J2-360.2’s in a bi-amplified system. 

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 the J2-360.2. 

  “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 the 
J2-360.2’s in a bi-amplified system.

 

 

 

2)  “Filter Freq. (Hz)”

 The J2-360.2 has separate 

Filter Frequency controls in each Channel 
Controls section for the low-pass filter and 
the high-pass filter. You will only use one of 
these in each channel section, depending on 
which 

“Filter Mode”

 you have selected (or 

none of them if you have selected the 

“Off”

 

position for the 

“Filter Mode”

).

When active, the filter in the J2-360.2 is fully 
variable between 50 Hz and 500 Hz via the 
control knob labeled 

“Filter Frequency (Hz)”

The “9 o’clock” position corresponds to 80 Hz 
and is  a good starting point for system tuning.

“bass boost” Controls

Each channel pair of the J2-360.2 includes a 

single band, boost-only bass equalizer controlled 
by a rotary knob marked 

“Bass Boost”

This control has a boost range of 0dB (full-
counterclockwise) to +9dB (full-clockwise) and is 
centered at 45 Hz. 

Filter Frequency (Hz)

Input Sens.

Bass Boost

min max

50

500

Off +9dB

Power

Protect

LEFT

RIGHT

LEFT

RIGHT

Preamp

Outputs

Amplifier

Inputs

HP | Off | LP

Filter Mode

High-Level Inputs

Summary of Contents for J2360.2

Page 1: ...llation 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 J...

Page 2: ... 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 hear...

Page 3: ... Brid FUSES Ground 20A 20A Remote 12VDC Product Description The JL Audio J2 360 2 is a two channel full range audio amplifier utilizing Class A B technology The J2 360 2 can be operated with a wide variety of source units and system configurations For detailed specifications please refer to Appendix B page 13 Typical Installation Sequence The following represents the sequence for a typical amplifi...

Page 4: ... speaker damage Turn On Lead The J2 360 2 is turned on and off using a conventional 12V remote turn on lead typically controlled by the source unit s remote turn on output e in China LEFT CHANNEL RIGHT CHANNEL Bridged FUSES Ground 20A 20A Remote 12VDC The amplifier will turn on when 12V is present at its Remote input and turn off when 12V is switched off If a source unit does not have a dedicated ...

Page 5: ...ing their way through the amplifier section to the speaker s This serves to improve tonal balance and to avoid distortion and possible speaker failure Correct use of this filter can substantially increase the longevity and fidelity of your audio system Filter Frequency Hz Input Sens Bass Boost min max 50 500 Off 9dB Protect er HP Off LP Filter Mode 1 Filter Mode Control The J2 360 2 employs a 12dB...

Page 6: ...ne 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 the J2 360 2 use a Y Adaptor to split the single channel signal into both left and right RCA inputs This option is useful when using the J2 360 2 to drive left channel speakers only and another J2 360 2 to drive right channel speakers only 2 Left Right Channel Informat...

Page 7: ...tc 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 connected set the amplifier s Remote Bass Control at maximum full clockwise 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 U...

Page 8: ...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 Appeaset 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 possib...

Page 9: ...is diagram to document your amplifier s switch and control positions Filter Frequency Hz Input Sens Bass Boost min max 50 500 Off 9dB Power Protect LEFT RIGHT LEFT RIGHT Preamp Outputs Amplifier Inputs HP Off LP Filter Mode High Level Inputs ...

Page 10: ...18 JL Audio 19 INSTALLATION NOTES INSTALLATION NOTES ...

Page 11: ...ly 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 au...

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