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JL Audio 12W1v3-4 (Open Box)

300W RMS 12" W1v3 Series Single 4-Ohm Subwoofer

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JL Audio 12W1v3-4 (Open Box)

300W RMS 12" W1v3 Series Single 4-Ohm Subwoofer


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25 Ft. 12 Gauge JL Audio Speaker Cable

Get true gauge JL Audio speaker wire to match your JL Audio subwoofer!


20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!


2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.



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JL Audio W1v3 Series Subwoofer Driver
JL Audio W1v3 Series Subwoofer Driver

The W1v3 is an outstanding choice when your build provides space that is very tight and amplifier power that is respectably moderate. The driver features a shallow mounting depth (5.41 in. / 137 mm) and a compact motor structure, allowing it to comfortably fit in a lot of spaces where a typical 12-inch driver will not. Lacking a pole vent, the rear of the motor structure can be placed directly against an enclosure boundary. In addition, excellent excursion capability and linearity allow it to reproduce sub-bass with striking extension and quality. Several of JL Audio's proprietary technologies enhance its performance and reliability. This includes JL Audio's patented DMA, Elevated Frame-Cooling and Floating Cone Attach Method™ technologies.

Dynamic JL Audio Performance

Dynamic JL Audio Performance

The 12W1v3 Subwoofer can be driven with as little as 75 Watts. However, for best audio performance it is recommended to run an amplifier capable of between 200 - 300 Watts of continuous power per driver, like the JL Audio JX500/1D. In addition, these subwoofers are optimized to operate in either a ported or sealed enclosure, needing only 1.10 cubic feet of air space in a sealed box and 1.60 cubic feet in a ported/vented enclosure. (Specific dimensions and figures can be found in the user manual, linked further below.)

Striking Linearity and Control

Striking Linearity and Control

DMA is JL Audio’s proprietary Dynamic Motor Analysis system and is aimed at delivering superior dynamic stability and low distortion. As a result of DMA optimization, W1v3 motors remain linear in motor force over an extreme range of excursion and also maintain a highly stable fixed magnetic field in the gap over a wide power range. This leads to tight, clean, articulate bass that also allows for extreme linear excursion, phenomenal power handling and control, control, control.

JL Audio 12W1v3-4 Recommended Power Range

General Features:

  • Item Condition: Like New, Open Box, Complete
    Not Refurbished







  • 12" W1v3 Series Subwoofer Driver
  • Power Handling:
    • RMS: 300 watts
  • Recommended Power Range: 75 - 300 watts
  • Impedance: Single 4-Ohm
  • Injection-molded, black mica-filled polypropylene cone
  • Nitrile-butylene rubber surround
  • Aluminum dust-cap with JL Audio logo
  • Removable and customizable mounting flange trim ring
  • Vented reinforcement collar
  • Elevated frame cooling technology
  • DMA-Optimized motor system
  • Insert molded suspension/coil/terminal sub-assembly
  • Stamped steel basket
  • Floating Cone Attach Method
  • Interlocking Cone and Dust Cap
  • Surround Stress-Relief
  • Nickel plated push terminals
  • Mounting depth: 5.41 "
  • Cutout dimensions: 11.0625"
  • Free Air Resonance (Fs): 26.21 Hz
  • Sensitivity: 86.1 dB
  • Xmax: 11 mm
  • Reference Efficiency (no): 0.2500%
  • Frequency response: ~22 ~ 200 Hz
  • Black Steel-Mesh Grille Insert Available: JL Audio SGRU-12
  • Matching Amplifier:
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product History:

JL Audio LS-12W1v3-4-OB thumbnail
(newest, current model)
JL Audio 12W1v2-4 thumbnail
(previous model, replaced by JL Audio 12W1v3-4 (Open Box))

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
W1v3 (JL Audio)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
600 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
300 watts
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
83.9 dB
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
11 mm
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.

Recommended Enclosure Specifications

Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Ported / Vented
Optimum Sealed Box Volume
This value indicates the ideal sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.10 cubic feet
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.


Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

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Accessory Tools and Products

Accessories added

25 Ft. 12 Gauge JL Audio Speaker Cable

Get true gauge JL Audio speaker wire to match your JL Audio subwoofer!

Your Price $34.99

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $53.99

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $70.97

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $97.97

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $18.99

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $64.73

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $8.97

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $1.99

Universal 12" Subwoofer Grille

Keep your subwoofer safe from accidental damages with this amazing grill.

Your Price $19.95

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $6.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

1 JL Audio 12W1v3-4 (Open Box) Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 JL Audio 12W1v3-4 (Open Box) Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

3 JL Audio 12W1v3-4 (Open Box) Subwoofers

4 Channel Amp

4 JL Audio 12W1v3-4 (Open Box) Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 1 question and 1 answer
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Why did you choose this?
Sonic Electronix Store
Liked my old JL subs, needed something for my truck without going crazy.
Sean S on Oct 23, 2016

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: JL Audio 12W1v3-4 (Open Box)