JL Audio G4500 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 the JL Audio Technical Support Department
at (954) 443-1100 during business hours.
OWNER’S MANUAL

JL Audio G4500 Specifications

General

Number of Channels	4
Rated Power (Bridged)	200W x 2
THD+N	< 0.05%
Input Sensitivity	200 mV - 4 V
Fuse Rating	30 A
THD at Rated Power	< 0.05%
Rated Power (2 ohms)	100W x 4
Damping Factor	>200
Crossover	High-pass, Low-pass

Summary

Protect Your Hearing!

Installation Applications

Planning Your Installation

Cooling Efficiency Considerations

Safety Considerations

Guidelines for safe installation and placement.

Stupid Mistakes to Avoid

Common installation errors to prevent.

Typical Installation Sequence

Power Connections

Details on connecting power wires and fuses.

Fuse Requirements

Recommended fuse types and ratings for the amplifier.

Turn-On Lead

Explanation of how to connect the remote turn-on lead.

Input Section

Input Voltage Range

Input Sensitivity Controls

Filter Mode Control

Filter Frequency (Hz)

Speaker Outputs

Bridging Considerations

Amplifier Status Indicator Lights & Protection Circuitry

Power Indicator

Protect Indicator

Advanced Rollback Thermal Protection

Low-Voltage Protection

System Configurations

Bi-Amplified System with One G4500

Bi-Amplified System with One G4500 in Four-Channel Mode and a Separate Subwoofer Amplifier

Input Connection Options for Four-Channel Bi-Amp System

Appendix A: Input Sensitivity Level Setting

The Nine-Step Procedure

Detailed steps for adjusting input sensitivity.

Appendix D: Troubleshooting

My Amplifier Doesn't Turn On

Troubleshooting steps for when the amplifier fails to power on.

Distorted or Attenuated Sound Output

Steps to diagnose and fix distorted or low sound output.

Fluctuating Output

Shuts Off at Higher Volumes

Diagnosing shutdown issues, often related to voltage.

No Output Despite Power

Troubleshooting steps for no sound output despite the amplifier turning on.