JL Audio 12W1v2-4

12W1v2-4 / 12W1v2-8
Subwoofers
owner’s manual
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.

JL Audio 12W1v2-4 Specifications

General

Brand	JL Audio
Model	12W1v2-4
Category	Subwoofer
Language	English

Summary

JL Audio Subwoofer Introduction

Welcome and Product Overview

Congratulations on purchasing a JL Audio subwoofer, a precision loudspeaker for sub-bass performance in vehicles.

Enclosure Design Advice

Recommends authorized JL Audio dealers for enclosure building and discusses sealed vs. ported enclosure benefits.

Subwoofer Physical and Technical Specifications

Dimensional Diagram and Labels

Illustrates physical dimensions labeled A through E, showing mounting and overall size characteristics.

Key Performance Specifications

Details technical data including resonance, Q factors, compliance, excursion, efficiency, impedance, and power handling.

Recommended Enclosure Designs and Guidelines

Sealed Enclosure Specifications

Provides net volume, external dimensions, and frequency response (F3, Fc, Qtc) for sealed enclosures.

Ported Enclosure Specifications

Lists net volume, external dimensions, and port details (width, height, length) for ported enclosures.

Enclosure Construction and Usage Notes

Covers material thickness, net volume adjustments, using multiple subwoofers, and bi-amplification recommendations.

Important Safety Warnings

Alerts users to potential hearing loss from high sound pressure levels and the risk of enclosures becoming projectiles in collisions.

Power Handling and Warranty Information

Recommended RMS Power Ranges

Explains power zones (minimum, optimum, maximum, void) for optimal performance, reliability, and avoiding damage.

JL Audio Limited Warranty (USA)

Outlines the one-year warranty, covered/excluded damages, transferability, and void conditions.

Product Service and Support

Provides instructions for obtaining warranty service, contact information, and return procedures.