JL Audio 15W3 18W3

Congratulations on your purchase of a JL Audio subwoofer component. Your JL Audio subwoofer is a
precision loudspeaker which has been engineered to produce the highest quality sub-bass performance in
your vehicle. Authorized JL Audio dealers have extensive technical information for many different
applications of your new speaker. They also have the knowledge, skills and tools to build a high-quality
enclosure that will maximize the performance of your speaker. We highly recommend that you have
your enclosure built by an authorized JL Audio dealer.
Inside you will find specifications and two recommended enclosures for your speaker; one is a sealed
enclosure, the other is a ported design. Both types of enclosures will give you excellent sound quality and
low-frequency extension. The sealed enclosure is a better choice if space is extremely tight, but the ported
enclosure will produce 3dB more output at the same power if you have the extra space to work with.
If you decide to build one of these enclosures yourself, you must have the construction of the box
inspected and approved by your authorized JL Audio dealer in order for the 1 year limited warranty to
be valid. Please read the warranty information carefully.
15W3 18W3
Subwoofers
owner’s manual

JL Audio 15W3 18W3 Specifications

General

Brand	JL Audio
Model	15W3 18W3
Category	Subwoofer
Language	English

Summary

Owners Manual Introduction

Welcome and Speaker Performance

Introduction to the JL Audio subwoofer, highlighting its precision engineering and performance capabilities.

Enclosure Types: Sealed vs. Ported

Explains the benefits of sealed enclosures for tight spaces and ported for higher output.

Warranty Validation Requirements

Details the requirement for authorized dealer inspection to validate the product warranty.

Subwoofer Technical Specifications

Detailed Performance Parameters

Presents comprehensive specifications including Fs, Qes, Qms, Vas, Xmax, and efficiency for each model.

Voice Coil Wiring Configurations

Illustrates series and parallel wiring options for the dual voice coil subwoofer configurations.

Recommended Enclosure Designs

Sealed and Ported Enclosure Specs

Provides net internal volumes and external dimensions for recommended sealed and ported enclosures for each subwoofer model.

Enclosure Construction Guidelines

Guidance on material thickness, net internal volumes, and accounting for driver/port displacement.

Multi-Subwoofer Enclosure Setup

Instructions for configuring enclosures for two or three subwoofers, including volume and port adjustments.

System Integration Advice

Recommends bi-amplified systems and advises against passive crossovers for optimal performance.

Power Handling and Warranty Information

Recommended Continuous Power Range

Defines power zones (minimum, optimum, maximum) for subwoofer drivers and identifies warranty void areas.

Limited Warranty Terms (USA)

Outlines the one-year limited warranty, coverage, exclusions, and conditions for USA customers.

Service and Return Procedures

Details the procedure for obtaining service and returning products to JL Audio, including proof of purchase requirements.