JL Audio A6450 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 and extended warranty
coverage, 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
A6450
six-channel system amplifier

JL Audio A6450 Specifications

General

Channels	6
Power Output (RMS) @ 2Ω	75W x 6
Power Output (RMS) @ 4Ω (bridged)	150W x 3
THD at Rated Power	<0.03%
Crossover	12dB/octave
Fuse Rating	40A

Summary

Safety and Installation Planning

Installation Applications and Planning Considerations

Critical Installation Warnings

Highlights crucial safety points like mounting, ventilation, wiring practices, and avoiding vital vehicle systems.

Product Description and Power Connections

Product Overview and Installation Sequence

Power Wiring, Fuses, and Turn-On Lead

Details how to connect power, the importance of fuses, and the function of the turn-on signal.

Input Signal and Sensitivity Settings

Input Section and Voltage Range

Input Sensitivity Adjustment Procedure

Guides on setting input sensitivity for maximum clean output and desired system balance.

Advanced Amplifier Controls

Filter and Bass Boost Features

Speaker Outputs and Bridging

Information on speaker connection types, impedance limits, and bridging amplifier channels for increased power.

System Configurations

Bi-Amplified System Setup

Advanced System Configurations and Crossover Setup

Subwoofer and Multi-Channel Level Control

Bi-Amplified Crossover Frequency Setup

Appendices: Setup, Frequencies, and Specifications

Input Sensitivity Level Setting Guide

A detailed step-by-step guide for setting input sensitivity for maximum, low-distortion output.

A6450 Technical Specifications

Troubleshooting Common Issues

Input Sensitivity and Output Problems

Amplifier Power and Stability Issues

Addresses problems related to the amplifier not turning on, fluctuating output, or shutting off at higher volumes.