JL Audio JX500/1D - 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
Class D Monoblock Subwoofer Amplifiers

Summary

Protect Your Hearing

Serial Number Identification

Installation Applications and Planning

Installation Applications

Specifies the intended use and limitations of the amplifier.

Installation Planning and Safety

Covers planning, cooling, safety, and common mistakes.

Product Description

Typical Installation Sequence

Power Connections

Minimum Power;Ground Wire Size

Recommended wire gauge for power and ground connections.

Important Grounding Notes

Guidance on proper grounding techniques and vehicle chassis wiring.

Fuse Requirements

Specifies fuse types and ratings for amplifier protection.

Remote Turn-On Operation

Amplifier Inputs

Low-Level Inputs

Connecting RCA preamp-level signals to the amplifier.

High-Level Inputs

Connecting speaker-level signals directly to the amplifier.

Input Sensitivity (Gain) Adjustment

Low-Pass Filter Control

Preamp Outputs (Preouts)

Bass Boost Control

Remote Level Control

Speaker Output

Bridging Warning

Prohibition and warning against bridging amplifier outputs.

Speaker Load Recommendation

Minimum speaker impedance and protection mode warning.

Status Indicator Lights and Protection

Servicing Your Amplifier

Appendix A: Input Sensitivity Setting Procedure

Necessary Equipment for Setup

Tools and test tones required for input sensitivity adjustment.

Nine-Step Setup Procedure

Step-by-step guide to setting input sensitivity for optimal output.

Important Sensitivity Adjustment Note

Warning against exceeding maximum gain levels for distortion prevention.

Appendix B: Specifications

Input Section

Details on low-level and high-level input types and ranges.

Signal Processing Features

Features like low-pass filter, preamp outputs, and bass boost.

JX250;1 D Specifications

Detailed technical specifications for the JX250/1D model.

JX500;1 D Specifications

Detailed technical specifications for the JX500/1D model.

JX1000;1 D Specifications

Detailed technical specifications for the JX1000/1D model.

Appendix C: Troubleshooting

Amplifier Not Turning On

Troubleshooting steps for an amplifier that fails to power on.

Output Fluctuates with Tapping

Diagnosing issues with output that fluctuates due to physical impact.

Amplifier Turns On With No Output

Troubleshooting steps for an amplifier that powers on but produces no sound.

Limited Warranty - Amplifiers (USA)

Warranty Coverage and Limitations

Details the warranty period, coverage, and exclusions.

Service and Return Information

Procedure for obtaining warranty service and returning the product.

JL Audio JX500/1D Specifications

General

Amplifier Class	D
Number of Channels	1
THD at Rated Power	<1%
Damping Factor	> 200
Input Sensitivity	200 mV - 4 V
Rated Power (14.4V, 2Ω)	750 W
Frequency Response	10 Hz
Low-Pass Filter	24 dB/octave
Subsonic Filter	24 dB/octave
Remote Level Control	Yes
Fuse Rating	40A