JL Audio JX360/4 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 JX360/4 Specifications

General

Product color	Black, Silver
Current	50 A
Input sensitivity	200 mV
High pass filter range	50 - 200 Hz
Signal-to-Noise Ratio (SNR)	100 dB
Number of amplifier channels	4 channels
RMS power output per channel (2 Ohm)	320 W
RMS power output per channel (4 Ohm)	220 W
Maximum power output per channel (4 Ohm)	280 W

Weight and Dimensions

Depth	195 mm
Width	391 mm
Height	53 mm
Weight	3450 g

Summary

Serial Number and Hearing Protection

Protect Your Hearing!

Critical safety warning regarding hearing damage from prolonged exposure to high sound levels.

Installation Applications and Planning

Planning Your Installation

Essential planning steps and considerations for a successful amplifier installation.

Cooling Efficiency Considerations

Guidelines for ensuring adequate airflow for optimal amplifier performance and longevity.

Safety Considerations

Important safety precautions for mounting the amplifier and routing wires within the vehicle.

Stupid Mistakes to Avoid

Common installation errors and dangerous practices to prevent damage or injury.

Product Description and Installation Sequence

Typical Installation Sequence

A step-by-step guide outlining the typical process for installing the amplifier.

Power Connections and Fuse Requirements

Fuse Requirements

Information on selecting and installing the correct fuse for power wire protection.

Turn-On Lead and Input Sections

Turn-On Lead

Details on connecting the remote turn-on lead to activate the amplifier.

Input Sections

How to connect audio signals using low-level (RCA) or high-level (speaker) inputs.

Input Mode, Bridging, and Controls

Input Mode and Bridging Options

Configuring input modes and understanding bridging for increased power.

Hi-Level Input Connections

Wiring details for high-level inputs and polarity importance.

Input Sensitivity Controls

How to adjust input sensitivity for optimal gain matching.

Filter Controls

Using high-pass and low-pass filters to manage frequencies.

Preouts and Speaker Outputs

Preouts

Understanding the pass-through preamp outputs for system expansion.

Speaker Outputs

Information on connecting speakers and recommended impedance loads.

Bridging Considerations

Guidelines for combining channels for increased power output and mono operation.

Amplifier Status, Servicing, and Appendices

Amplifier Status Indicator Lights

Understanding the Power and Protect indicator lights on the amplifier.

Servicing Your Amplifier

Instructions and contact information for seeking professional repair services.

Appendix A: Input Sensitivity Level Setting

Detailed procedure for setting input sensitivity for optimal audio performance.

Appendix B: JX360/4 Specifications

Technical specifications for the JX360/4 amplifier, including power ratings and dimensions.

Troubleshooting

My amplifier doesn't turn on

Steps to diagnose and resolve issues where the amplifier fails to power on.

My amplifier turns on, but there is no output

Troubleshooting steps for when the amplifier powers on but produces no sound.

Limited Warranty Information