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JL Audio CS112LG-TW3

Sealed PowerWedge™ enclosure with one 12" TW3 subwoofer

15 Reviews | 6 questions - 15 answers

Item # 136112LGW3

Low Stock

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825 Gardens Blvd

109 South Carlton

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Our take on the JL Audio CS112LG-TW3

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.    

JL Audio Built In USA 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

What's in the Box:

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

Great subwoofer!! Uses very little room in my trunk and hits all the bass notes!

Anonymous, San Diego, CA


JL Audio CS112LG-TW3 Reviews

Average Customer Review(s):

(15 Reviews)

JL is the way to go.

Ernesto from Tucson, AZ on 12/8/2017

Crutchfield Customer Review (What's this?)

Almost too much for my 2013 Tundra Double Cab. I paired it with the JL Audio JX500/1D and WOW! The gain on the amp is set to around 2/3 and it sounds amazing. JL is the way to go. The sub barley fits under the rear seat. The support for the seat cushion slightly bent the outer edge of the grille, but it fits, it's out of sight and I'm pretty confident it will not interrupt the sub. Low end response is mean and none other.

Pros: Made by JL.

Cons: Made me realize how much my truck can rattle.

Nothing short of impressive.

Ben from Lorton, VA on 7/27/2017

Crutchfield Customer Review (What's this?)

Amazing subwoofer. For such a small box, this thing really hits. I wanted something small and light so I could remove it easily to use the cargo space in my hatch. I went with a 12 over a 10 because I thought the flat cone and small box would give me a little less output. Almost wishing I had gone with the 10. The output is simply amazing.

Pros: Small box. Powerful bass.

Cons: Needs quite a bit of power for a single sub.

That JL sound

Jason from Anderson, SC on 6/22/2017

2009 Cadillac SRX
Crutchfield Customer Review (What's this?)

American made right here in Florida. This woofer is a beast. The sound this thing makes powered by a JL RD500/1 is so clear and defined. The lows are tight with no sloppy roll off. Great woofer in a really small package. If you want clean well defined bass in a small put it almost anywear this sub is for you

Pros: Small, Compact, American Made, Lots of low end in a small package

Cons: Havent found any yet

JL Audio CS112LG-TW3

Anonymous from San Diego, CA on 3/28/2017

Crutchfield Customer Review (What's this?)

Great subwoofer!! Uses very little room in my trunk and hits all the bass notes!

Pros: Small space hard hitting bass!!

Cons: None!!

JL Audio CS112LG-TW3

Anonymous from New Rochelle, NY on 3/13/2017

Crutchfield Customer Review (What's this?)

Good clean bass up to 100hz. Probably good to 125hz but that's what mids are for. Got the JL audio mono 500w amp to go with it. Very god quality with not distortion. Handles all types (the sub) of bass lines well. More than enough bass the make me deaf in my hatchback.




Brian D from San Bruno, CA on 2/10/2017

Crutchfield Customer Review (What's this?)

Absolutely grinning when I'm driving my truck with this thing bass quaking. Very pleased with our purchase.

Pros: this thing Rocks with pounding bass....Just what we were looking for..... fits behind my single cab truck seat.

Cons: probably gonna loosen all the trucks bolts.... no complaints ....

JL Audio CS112LG-TW3

Anonymous from Birmingham Al on 11/6/2016

Crutchfield Customer Review (What's this?)

Replaced 2 JL Audio 8's in ported boxes with this 12. Using a Kenwood Excelon X801-5 to drive this sub. Sound is tighter lower bass. This was an excellent upgrade!

Pros: The sealed box fits under the rear seat of a Chevy Z71 Crew Cab with great bass

Cons: None

Perfect Sub

Aaron from Montgomery, AL on 7/30/2016

Crutchfield Customer Review (What's this?)

Perfect sub for my setup. I drive a 2014 tundra so finding a sub that met my needs were hard to come by. With the help of Crutchfield I bought this sub and it exceeded all my expectations. I kept my original headunit and matched it with an lc2i and I now have a decent sounding setup and I haven't replaced my door speakers yet. I actually think the lc2i enhanced them a little. I had everything professionally installed and im very happy. Also, because of the tight fit under my back seat I had to make one small modification of using washers to lift my seat just a tad to keep the seat from bending the grill. The grill was actually bent when I recieved it but I didn't trip I was too excited to get this baby cranking. My installer took the grill off and bent it back to its original shape and kept it moving. Overall you will not be disappointed. I listen to alot of genres of music and the musicality of this sub is superb. Plus, I only keep the bass knob turned halfway because this thing can thump. You won't have that loud trashy bass that can be heard a mile away but when it's time to roll the windows down and crank it up it can get down with the best of them.

Pros: Quality bass in tight configurations. Excellent build quality. Low profile matched interior perfectly.

Cons: The grill can bend easily if not careful and can be tough to remove.


Steve M from Waynesboro, VA on 3/30/2016

2010 Ford F-150 XLT

I wish I could rate it with stars but it will not let me! I give it a 5 overall! It fits under the back seat but it sticks out a little. My passengers have leg room so no issue with that but they have an issue with the thump under their seat!! Lol!!

Pros: Size and shape

Cons: Size and shape

Simply the best

Juan R from Texas on 9/18/2015

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

Kevin B. from Brick, NJ on 7/8/2015

Crutchfield Customer Review (What's this?)

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

Matt from Jacksonville North Carolina on 1/22/2015

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!

Jason from Houston, TX on 1/13/2015

Crutchfield Customer Review (What's this?)

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

Mike from Fort mill sc on 8/20/2014

Crutchfield Customer Review (What's this?)

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

JohnH. from Boston, MA on 4/9/2014

Crutchfield Customer Review (What's this?)

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

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.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Because its made in the USA 100% in Florida. Long time JL Audio customer [ Jason  May 03, 2017 ]
Great crisp sound with no lose of power.... Great buy [ Brandon  Apr 15, 2017 ]
Reviews and size. [ Djclutch  Feb 26, 2017 ]
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 ]

6 questions already asked

Just remember the speaker itself is screwed into the box. So not a concern I have ever had about an air leak. You would not have any sound degrading from that small of a hole. [ James  Nov 21, 2017 ]
Hi I actually have this box and would recommend 1/4" screws or heavy duty 3M double sided tape. The box's fairly heavy and does not need much to secure it unless your are 1. off-roading 2. mounting it on its side. 3. mounting it to a non carpeted surface. I wedged mine between my amp and corner/end of my trunk in the daily driver and I drive spiritly. Another suggestion I'd recommend is to wedge the sub in with 4 L brackets; just screw into the trunk and not the actual sub. [ Djclutch  Nov 20, 2017 ]
As long as a screw fills the hole you drilled, there is no leak. [ BENJAMIN D  Nov 20, 2017 ]
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. [ Kenny  May 26, 2017 ]  Staff
Thanks for your question. For information on selecting the best amp for your sub 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 between the amp models and help you make the best choice for your system. [ Kenny  Feb 14, 2017 ]  Staff
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 ]
I'm running this with a 5 channel amp pushing 600w at 2 ohms, and I've had nothing but perfect sound. Keep the gain on your amp down and your fine. More power is way better than too little power. [ BENJAMIN D  Nov 20, 2017 ]
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