JL Audio JX360 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 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 our Technical Support Department
at (954) 443-1100 during business hours.
OWNER’S MANUAL
360W 4-Channel, Full-Range Amplifier

JL Audio JX360 Specifications

General

Fuse Rating	30A
Power Output (RMS)	60W x 1 @ 4 ohms (12.5V)
THD+N	< 1%
S/N Ratio	> 90 dB
Signal-to-Noise Ratio	> 90 dB
Signal to Noise Ratio	> 90 dB
Input Voltage Range	200mV - 4V
Input Sensitivity	200mV - 4V
Dimensions	53mm
Crossover	12dB/octave low-pass (50Hz - 250Hz)

Summary

Protect Your Hearing

Serial Number

Installation Applications

Mounting the amplifier upside down

Discourages mounting the amplifier upside down for proper operation.

Safety Considerations

Emphasizes safe installation practices and vehicle safety equipment interaction.

Stupid Mistakes to Avoid

Lists common installation errors to prevent damage or hazards.

Product Description

Typical Installation Sequence

Power Connections

Fuse Requirements

Turn-On Lead

Input Sections

Low-Level Inputs

Standard left/right RCA jacks for preamp level signal input.

Hi-Level Inputs

Connect speaker level signals using supplied mating connectors and harnesses.

Input Sensitivity Controls

Filter Controls

Filter Mode Control

Selects High-Pass, Low-Pass, or Off for the active filter.

Filter Frequency (Hz)

Adjusts the filter cutoff frequency between 50 Hz and 200 Hz.

Preouts

Speaker Outputs

Bridging Considerations

Left Channel Only or Right Channel Only Information

Use a Y-adaptor to split signals for driving single-channel speakers.

Left + Right Channel Information

Combines left and right channels into a summed mono channel for subwoofers.

Amplifier Status Indicator Lights & Protection Circuitry

Power Indicator Light

Green light indicating the amplifier is on and operating normally.

Protect Indicator Light

Red light indicating amplifier protection circuitry has been activated.

Servicing Your Amplifier

Appendix A: Input Sensitivity Level Setting

Necessary Equipment

Lists required tools and materials for setting input sensitivity.

The Nine-Step Procedure

Step-by-step guide for adjusting input sensitivity for maximum low-distortion output.

Appendix B: JX360/4 Specifications

Appendix C: Troubleshooting

My amplifier doesn't turn on

Troubleshooting steps for when the amplifier fails to power on.

My amplifier's output fluctuates when I tap on it or hit a bump

Diagnosing intermittent output issues related to physical shock.

My amplifier turns on, but there is no output

Steps to diagnose and resolve situations where the amplifier powers on but produces no sound.

Installation Notes

Limited Warranty - Amplifiers (USA)