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JL Audio 8W1v3-4

8" 4-ohm subwoofer

20 Reviews | 7 questions - 11 answers

Item # 13692079

In Stock

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825 Gardens Blvd

109 South Carlton

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Our take on the JL Audio 8W1v3-4

When we think of subwoofers, we typically think of big speakers in large enclosures driven by high-wattage amplifiers. But sometimes you need bass in a smaller, more modest version. That's why JL Audio has created the 8W1v3-4 subwoofer, which fits in spaces where most subwoofers fear to tread.

Legendary JL Audio engineering

When we think of subwoofers, we typically think of big speakers in large enclosures driven by high-wattage amplifiers. But sometimes you need bass in a smaller, more modest version. That's why JL Audio has created the 8W1v3-4 subwoofer, which fits in spaces where most subwoofers fear to tread.

Trickle down technology

This affordable 8" subwoofer incorporates patented features developed by JL Audio for their legendary W7 subs. Special venting keeps the sub running cool for trouble-free performance, while extensive research in cone bonding and motor assembly construction keeps its cone movement linear for precise, dependable output. The cone interlocks with the dust cap for superior rigidity, and a sophisticated suspension system keeps internal parts aligned properly when you're jamming hard.

JL Audio 8W1v3-4 8" Component Subwoofer

At only 3-7/8" deep, this sub will fit in a lot of tight spaces.

Solid bass made for compact boxes

The low-profile 8W1v3-4 sub works best in compact enclosures, so you can put quality bass in smaller and hard-to-fit vehicles. Its shallow mounting depth of 3-7/8" allows it to live in compact environments, and it's been optimized to fit an enclosure with a volume of only 0.35 cubic feet. 

The sub features a mica-filled polypropylene cone and an aluminum dust cap with an embossed JL Audio logo for a look that stands out as much as the sound. The removable, customizable trim ring lets you put a personal touch on your system, and makes optional grille installation a snap. This punchy W1v3 sub works well with moderate power, delivering impressive performance without costing a fortune. Haven't you got a cozy corner somewhere that needs some bumping bass?

To drive this single subwoofer, we recommend a mono amplifier rated between 120 and 225 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Product Highlights:

  • 8" 4-ohm subwoofer
  • mica-filled polypropylene cone with nitrile-butylene rubber surround
  • power range: 50-150 watts RMS
  • peak power handling: 300 watts
  • frequency response: 25-250 Hz
  • sensitivity: 84.8 dB
  • top-mount depth: 3-7/8"
  • sealed box volume: 0.35 cubic feet
  • ported box volume: 0.5 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • One 8" Single 4-ohm voice coil subwoofer
  • Black plastic trim ring (installed)
  • Owner's manual

JL is by far one of the best brands in the industry. The 8" woofer is a cult classic and this version does not disappoint.

Anonymous, NY


JL Audio 8W1v3-4 Reviews

Average Customer Review(s):

(20 Reviews)

OMG to OHM's!

gary c from St Petersburg, FL on 12/1/2017

Crutchfield Customer Review (What's this?)

Purchased for factory replacement sub in my 2007 Tundra Double Cab w/JBL Nav system (OEM bass under rear jump seat came apart, old age). Had to do some modification to the factory underseat bass box to make this fit, this speaker is an inch too deep on a top mount install. Problem: The JBL system in all toyotas are 1.8 OHM as measured at the speaker. This JL is a 4 OHM. It was light years ahead of the stock unit, but because the OHM's did not match the other speakers in the truck it required constant tone adjustment for different music. Pain in the ass! I would tune it for a strong modern bass song, and sounded great, then a softer bass song from and old rock song would sound empty, no bass at all. Lesson not mix and match OHM's in your system. Crutchfield support was absolutely AWESOME! Hank helped me figure this thing out, even had me send him a pic of my OEM part to determine voice coil count, and research any number on it! We came to the conclussion the JL had to go, and w/Crutchields 60 day return policy... they hooked me up with a new RetroSound 2 OHM 8" R-TW82 and shipped the same day with an RMA sent to my e-mail! Instant satisfaction! Great that I did not have to return the JL before they send the RetroSound! I don't know who is in charge of Crutchfields buisness model, and customer first attitude, but they nailed it! Thanks Crutchfield! P.S. I will review the RetroSound as soon as it is installed and thumping!

Pros: It's JL, what can you say! Great sub!

Cons: N/A

JL audio

JOHN from Salinas, CA on 10/27/2017

Crutchfield Customer Review (What's this?)

Had to buy 8 in subwoofers due to space requirements my friend gave me 2 8 in in another well known popular brand after installing t was a slight improvement however not musical and missing that thump and clear rumble that brings a smile to our faces . I did alot of research read alot of reviews The JL audios were raved about so I ordered from Crutchfield the price was well within my budget and I figures if they weren't an immediate upgrade I could return them Wow what a difference not a little difference but an astonishing improvement My buddy was also immediately impressed so much so that he is going to replace his 10 in sub in his 2015 silverado. Thank you to Crutchfield for carrying such fine products at amazing prices and for speedy service I am a loyal customer for life

Pros: Very musical clear crisp n thumps way lower than most everything else especially in price range

Cons: None other than I wish I could have fit 10s or even 12s

JL Audio 8W1v3-4

Anonymous from NY on 8/20/2017

2012 Chevrolet Captiva Sport
Crutchfield Customer Review (What's this?)

JL is by far one of the best brands in the industry. The 8" woofer is a cult classic and this version does not disappoint.



JL Audio 8W1v3-4

Anonymous from Bouton,ia on 7/27/2017

Crutchfield Customer Review (What's this?)

Good quality



JL Audio 8W1v3-4

Anonymous from Sonora, CA on 2/8/2017

Crutchfield Customer Review (What's this?)

Did not fit 2001 stock sub box. Had to modify sub to fit. Also doesn't sound good , my gues not enoff air space in box. Don't trust the vehicle look up listing.



JL Audio 8W1v3-4

Anonymous from Virginia Beach, VA on 1/1/2017

2002 Toyota Tundra
Crutchfield Customer Review (What's this?)

I installed 2 of these in a Q-logic box running at 4 ohms with 150 watts to each in my toyota tundra. They sound fantastic! I am amazed at the bass they produce.

Pros: Tight accurate bass!

Cons: They are not dual voice coil, so I couldn't run both at 4 ohms on one channel.

JL Audio 8W1v3-4

Andre from California on 12/26/2016

2004 Toyota Tacoma
Crutchfield Customer Review (What's this?)

Great packaging subs look good. Can't wait to hear them



Freaking Awesome!

Kevin from Sherman Oaks, CA on 6/24/2016

2013 Lexus CT200H
Crutchfield Customer Review (What's this?)

It took about 5 days after install for this sub to break in in sound but the sound quality is fantastic. Very rich, deep bass that you hear and feel. Music is greatly improved and I'm in love. It's amazing how adding this sub truly gives me the chills every time I listen to music in the car. By the way, this thing bumps. I put a knob on my kicker amp and only have this thing turned up about 7% of the way and it hits.

Pros: Bass you'll hear, feel and love

Cons: Nothing

JL Audio 8W1v3 4 & jx250/1 amp

Elvin G from Slidell, LA on 3/11/2016

Crutchfield Customer Review (What's this?)

this JL AUDIO merchandise is the greatest.



J L sub

George from lake city, SC on 3/9/2016

Crutchfield Customer Review (What's this?)

Replaced the factory sub in my 07' F150 with a little help from a heat gun to give me the depth it needs. Sounds great with a aftermarket amp.

Pros: Great quality

Cons: None

Great upgrade from stock sub

Wikiwha? from Nevada on 9/20/2015

Crutchfield Customer Review (What's this?)

Awesome speaker like all jl audio products.

Pros: Great sound quality

Cons: Spendy


Hus from Danville, nh on 9/18/2015

Crutchfield Customer Review (What's this?)

Just enough bass for quality music and surround sound DVD. After a little triming for depth clearance it works perfectly in the stock Toyota sienna subwoofer enclosure.



Really great sound

Miguel Angel from PR on 9/4/2015

Crutchfield Customer Review (What's this?)


Pros: Great

Cons: None

JL Audio 8W1v3-4

Anonymous from California on 9/1/2015

Crutchfield Customer Review (What's this?)

Great replacement for stock sub in my 98 ES lexus.

Pros: solid sound, deeper bass than stock

Cons: not as loud as stock, difficult install

Little Package Huge Hit!!!

Robert - North Carolina from North Carolina on 8/19/2015

Crutchfield Customer Review (What's this?)

Got this Sub to fit into my 2001 Ford Expedition Stock Sub Box with Stock Amp and I was amazed how the sound and power it produced. It hits like a 12". I had to utilize a .5" spaced ring to make if fit because of its depth but that it. I am over joyed with the results.

Pros: Size, Output, Power Handling, Sound, Great

Cons: None that I have encounter yet

JL Audio 8W1v3-4

Matt from Grand Rapids, MI on 5/29/2015

Crutchfield Customer Review (What's this?)

Nice little sub for the money, just wish it would hit harder.but what can you expect for an 8" sub?

Pros: Quality build and looks good.

Cons: Light hitting.

JL Audio Woofer

deryck from Miami on 5/18/2015

Crutchfield Customer Review (What's this?)

Excellent quality and sounding subwoofer. Do not be put off by its size.



very pleased

Scott R from California on 11/29/2014

Crutchfield Customer Review (What's this?)

I bought this subwoofer to replace the blown stock subwoofer in my '99 Ford Expedition Mach system. The sound quality is hands down better than the stock speaker. The speaker is playing lows that the stock speaker could not produce. For those wanting to purchase this for the same application, read on: Even though this is a relatively shallow speaker, it is still just a little deep for the stock enclosure. I had to modify the enclosure by softening the area that the old subwoofer was bolted through the magnet with a heat gun and push it back a half inch. I had measured the stock enclosure prior to ordering and knew this would needed. As one would expect, the bolt pattern is not exact, so you will need to drill new holes.

Pros: Awesome replacement for a stock subwoofer.


Great small sub (fits Focus SVT)

DDriver from California on 11/18/2014

Crutchfield Customer Review (What's this?)

Great narrow compact sub. It was a replacement for a factory sub on my Focus SVT 2002. Complete easy swap. The factory amp can push this small bad boy. Sounds better than stock subwoofer

Pros: Good punch for a very small package perfectly fits into factory box of focus mk1 (SVT audiophile package), except drilled wholes are not aligned absolutely perfectly.


Jeep wrangler

Robbie M. from Charlotte, NC on 7/15/2014

I installed two of these JL 8s in my 2010 four door Jeep wrangler in a custom fiberglass box and the sound quality was fantastic even while the roof and door were off.

Pros: Small out of the way but hit hard at the same time due to the quality of the Sub

Cons: Small


Hands-on research

Product Research

Enclosure Compatibility


Woofer: The JL Audio W1v3-4 subwoofer features an injection-molded, mica-filled polypropylene cone with an embossed metallic JL Audio logo and a rubber surround for added durability, woofer excursion and bass response.

Dynamic Motor Analysis (DMA): DMA is JL Audio's proprietary method of improving dynamic motor behavior. As a result of DMA optimization, W1v3-4 motors remain linear over a long excursion range, and also maintain a stable fixed magnetic field in the gap over a wide power range. The result is reduced distortion, faithfully reproduced transients, and tight, clean, articulate bass.

Floating Cone Attachment Method (FCAM): JL Audio's patented FCAM technology is an innovative method of bonding the surround/cone assembly to the voice coil/spider assembly. This assembly technique ensures proper surround geometry in the assembled speaker for better excursion control and dynamic voice coil alignment.

Vented Reinforcement Collar: The Vented Reinforcement Collar (VRC) is a composite structure that addresses two issues related to reliability:

  • Stress Relief: By reinforcing the critical junction between the cone, voice coil and spider, the VRC greatly reduces failures due to glue breakdown or material weakness. It does this by increasing adhesive contact area and providing stress relief to the spider material at excursion extremes.
  • Air Flow: The VRC also features slots that facilitate air flow directly onto the voice coil windings, thus reducing thermal compression effects and enhancing reliability.

Insert Molded Suspension/Coil/Terminal Sub-Assembly: The W1v3-4 features a unique spider, coil and terminal subassembly, assembled prior to installation in the speaker frame for optimum alignment and glue-joint integrity. This type of assembly ensures precise lead wire length, lead wire entry and exit angles, and coil/spider alignment.

Elevated Frame Cooling System: The elevated frame design of the W1v3-4 delivers cool air through slots directly above the top-plate to the voice coil of the speaker. This not only enhances power handling, but also sound quality by minimizing dynamic parameter shifts and power compression.

Customizable Trim Ring: The woofer comes with a removable ring made of black ABS plastic which can be painted to match the installation theme and create a personalized look. You can purchase an optional grille mesh insert specifically designed to fit into the inner diameter of the trim ring (item number 136SGR831, sold separately).

Enclosure Compatibility

Sealed Enclosure: JL Audio recommends an optimum sealed enclosure volume for the 8W1v3-4 of 0.35 ft³, resulting in a -3dB point of 59.9 Hz.

Ported Enclosure: JL Audio recommends an optimum ported enclosure volume for the 8W1v3-4 of 0.5 ft³. The recommended port is 2" (diameter) x 10" (long), resulting in a tuning frequency of 38 Hz and a -3dB point of 39.1 Hz.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Great brand and good shallow offering for a convertible install. [ Alan  Dec 06, 2017 ]
Replaces the existing sub woofer. [ W  Sep 20, 2017 ]
4 of these matched the power output of the amp i already had. [ Jared  Aug 24, 2017 ]
JL is by far thee best in serious car audio. [ Jason  Jul 26, 2017 ]
everyone knows JL has the quality [ Gabriel  May 10, 2017 ]
I picked these speakers because the are the best out there. [ Michelle L.  Oct 05, 2016 ]
love JL audio products they always sound amazing !! [ SHAWN  Sep 05, 2016 ]
Tight little woofer! Very happy with the performance of this lil' guy. But we're not using it in a vehicle, so take that with a grain of salt..... ;). [ Todd  Jul 12, 2016 ]
It is compact enough to fit in my custom made box for my 04 tacoma double cab [ D_Offie  Jul 12, 2016 ]
Specifications matched my needs [ Steve  Mar 16, 2016 ]
Advisor Casey helped on deciding that this would be great. [ ERIC M  Dec 05, 2015 ]

7 questions already asked

Amp. To push it! And a boxnto put speaker in needs to be exact dimension or sounds like crab... [ Ken  Nov 25, 2017 ]
Nope [ IVAN  Aug 31, 2017 ]
No. [ Dave  Aug 31, 2017 ]
No [ Rex  Aug 31, 2017 ]
Sure does! It's the one in the pictures above. [ Kyle  Aug 31, 2017 ]
These speakers are designed to be run with an amp [ Rex  Aug 31, 2017 ]
The JL Audio 8W1v3-4 can be used with simple speaker output but you won't get the full benefit of the Deep hard hitting Base that you would with an Amp and subamp output. If your Radio sends at least 10-20 Watts per speaker you should get good sound out of it. I truly hope this helps but if you have any other questions please feel free to let me know. [ Robert James  Oct 24, 2016 ]
I don't remember it's been long time since I bought and install these [ Rex  Aug 31, 2017 ]
The JL Audio 8W1v3-4 Subwoofer has a 7 1/4 Inch Diameter Cutout with a Mounting Deapth of 3 7/8 Inchs. I truly hope this helps and mine sounds great. [ Robert James  Sep 15, 2015 ]
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Aug 21, 2015 ]  Staff
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Greg  Jul 28, 2014 ]  Staff