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JL Audio CS112LG-TW3

Sealed PowerWedge™ enclosure with one 12" TW3 subwoofer

Item #: 136112LGW3

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Expected: 2/17/2016 Reserve yours risk-free

6 Reviews | 3 questions - 9 answers

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JL Audio quality in a thin package

The PowerWedge CS112LG-TW3 enclosure pumps out signature JL Audio bass from a small sealed box. Install it anywhere that you might have a little room, like behind a seat or in the trunk, add an amp, and enjoy the extra depth that good bass will add to your system.    

Immense bass

JL Audio used their extensive engineering know-how to build a super-thin TW3 subwoofer that offers big performance. This PowerWedge handles up to 400 watts RMS, housing one 12" TW3 subwoofer that pounds out impressive low end. The enclosure is matched to the sub for optimum output, and the airtight sealed design delivers powerful, accurate bass.  

JL Audio PowerWedgeCS112LG-TW3 Single 12" 2 Ohm Sealed Hatchback Sub

This enclosure's slender profile means it'll fit behind seats or in other tight spaces.

Solid MDF enclosure

JL Audio uses state-of-the-art automated woodworking equipment to fabricate the high-quality MDF enclosure, then finishes it with rugged automotive carpeting, nickel-plated push terminals, and solid internal wiring. The enclosure is inspected by hand at the manufacturing facility in Florida to ensure that you get the bass that you expect from JL Audio.

Product Highlights:

  • sealed enclosure with one 12" TW3 subwoofer
  • 5/8" medium density fiberboard construction covered with black carpet
  • steel-mesh grille
  • 2-ohm total impedance
  • power handling: 100-400 watts RMS
  • frequency response: 22-200 Hz
  • sensitivity: 82 dB
  • 23-3/5"W x 15-1/4"H x 4-4/5"D (without grille)
  • warranty: 2 years
  • Our 60-day money-back guarantee

Enclosed Subwoofers 101

An enclosed subwoofer is a box with a subwoofer already installed. The advantage to buying an enclosed sub is that the manufacturer made the sub, then designed and built the box as a perfect match, so you'll get the best possible performance. Every enclosed sub has a maximum RMS power handling rating, so pair it with an amp with a similar RMS power rating to get the best performance.

JL Audio CS112LG-TW3 Reviews

Average Customer Review:

6 Reviews

Simply the best

Written by: Juan R from Texas on September 18, 2015

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

What I really wanted for my 2013 Toyota Tundra was a JL Audio Stealthbox but they are very pricey. So I went with this TW3 instead. I am using a 200W PowerBass amp and I have a Pioneer AVH 3700 unit. This speaker really sounds great. I also have 2 6x9 C2s in the front doors and 2 6x5s in back doors and this subwoofer definitely completes the package.

Pros: I recommend this product

Cons: No cons

Fantastic Sub

Written by: Kevin B. from Brick, NJ on July 8, 2015

Crutchfield Customer Review (What's this?)

  • Not Rated
    "Coolness Factor"
  • Not Rated
    Build Quality
  • Not Rated
    Ease of Use
  • Sound Quality
  • Not Rated

I had a tough time deciding on what kind of subwoofer to install in my 2012 Titan crew cab. Wanted something that wasn't visible. Crutchfield had my answer, to all of audio needs. They showed me this JL audio 12" enclosed sub that fits perfectly under the rear seat. Let me say, it ROCKS!!! And so does Crutchfield's customer service. I am a customer for life. Thanks to all who work there!

Pros: Can't beat JL audio quality, can't beat Crutchfield's customer sevice


Great Sub

Written by: Matt from Jacksonville North Carolina on January 22, 2015

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Great small sub this thing hits soooo hard and has great quality it vibrates your ribcage! I recommend this sub to anyone that loves a loud bass

Pros: Loud clean quality not too expensive

Cons: Doesn't have built in amp but that's not too bad

How crap what a sub!

Written by: Jason from Houston, TX on January 13, 2015

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

This is the best small sub I've had. I replaced two Alpine type R and it is almost on the same level.

Pros: Sound quality Size It is perfect

Cons: None

Amazing sub and so little space

Written by: Mike from Fort mill sc on August 20, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Speaker is so bassy and clear sounding. Low bass and thumps so hard. Small area that it takes up. Would love to have two.

Pros: Size, quality, sound, craftsmanship. Etc. .

Cons: No cons from me

What is there to say

Written by: JohnH. from Boston, MA on April 9, 2014

Crutchfield Customer Review (What's this?)

  • Not Rated
    "Coolness Factor"
  • Not Rated
    Build Quality
  • Not Rated
    Ease of Use
  • Not Rated
    Sound Quality
  • Not Rated

What is there to say? This thing bangs. I have it running a mere 300RMS through a small Kenwood 5001 and I have no complaints. Other than I'm sure my rear view mirror will fall off in the near future. It fits well in most places, DOUBLE CHECK YOUR DIMENSIONS! I don't know why I thought this would fit anywhere else in my car, but thats my own fault for not measuring.

The response is SUPER clean, pretty much everything about this sub is wonderful.

2009 Mini Cooper Clubman Kenwood 5001 JL Audio TW3 12" Pioneer Speakers all around.

Pros: BOOM, BOOM. BOOM, clean, perfectly sized box, compact, It's JL Audio

Cons: Speaker grille is hard to get off? ONLY complaint. I need it off for my set up and I'm worried about breaking it trying to get it off. Other than that, nothing!

Hands-on research

What's in the box?

Download owner's manual

  • CS112LG-TW3 Sealed subwoofer enclosure (loaded with one 12TW3-D4 woofer)
  • Black metal grille (installed)

Features and Specs

Woofer Size (inches) 12
Woofer Material Mica-filled Poly
Enclosure Type Sealed
Color Black
Pieces in System 1
Width (inches) 23-3/4
Height (inches) 15-3/8
Depth (inches) 6-5/8
Second Depth (inches) 5-1/8
Connector Type 5-way post
Frequency Response 22-200 Hz
Power Range (Watts RMS) 125-400
Maximum Wattage 800
Sensitivity 82 dB
Impedance 2 ohms
Parts Warranty 2 Years
Labor Warranty 2 Years

Product Research


Overview: The CS112LG-TW3 PowerWedge subwoofer system is a compact bass solution for vehicles with limited space. This sealed enclosure is loaded with one 12TW3-D4 subwoofer. The sub's dual 4Ω voice coils are internally wired in parallel to present a 2Ω final impedance.

Enclosure Design: The enclosure features top-quality MDF (medium-density fiberboard), constructed using state-of-the-art CNC woodworking equipment, and covered with high-grade automotive carpeting. The driver is protected by a black steel-mesh grille. One pair of 5-way binding posts is on the left side of the enclosure.


  • Width: 23-3/4"
  • Height: 15-3/8"
  • Depth:
    • 5-1/8" (enclosure)
    • 6-5/8" (including grille)

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.

Customer Q&A

Crutchfield asked  
Why did you buy this?

I needed a subwoofer that is great sounding most of all. I wanted a sealed box for great rock music and accurate sound. I love JL Audio and read all the reviews and did research for about 2 months, and it's Christmas... :) [ Patrick  Dec 31, 2015 ]

3 questions already asked

THe amp is quite capable of driving this, likely well beyond your expectations. I run 4 alpine tweeters 2 kicker 6x9 2 kicker 61/2 and 2 polk audio mm8 dvc subwoofer through a audiocontrol dqdx processor, sounds awesome! [ GREGORY A  Dec 28, 2015 ]
No not enough to push it had to trade it at a local stereo shop to get a amp big enough to push it. [ jason  Dec 28, 2015 ]
Yes, it will power it so well u will destroy the sub eventually!!! You need a 4ohm impedance sub to handle the amp [ devin  Dec 28, 2015 ]
More than enough. [ Thomas  Dec 27, 2015 ]
Not sure, I've got mine hooked up to a JL jx500 and it barely pushes it. [ jason  Dec 27, 2015 ]
This speaker needs its own amp trust me powerful as hell. [ jason  Oct 31, 2015 ]
As long as you can tune it down, you should be fine. I am running a dedicated 500W amp on my JL audio CS112LG-Tw3 and it has performed fine. One concern would be playing really low frequencies and the amp overpowering the sub, so tune accordingly. [ alex  Oct 30, 2015 ]
Yes this speaker will pair great with the odd amp I have this set up in my mustang , sounds great [ corey  Oct 30, 2015 ]
Thanks for your question. For information on comparing two or more models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget. [ Krissy  Jul 18, 2014 ]  Staff