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JL Audio 12TW3-D4

Shallow-mount 12" subwoofer with dual 4-ohm voice coils

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  • JL Audio 12TW3-D4

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  • JL Audio 12TW3-D4

  • JL Audio 12TW3-D4

  • JL Audio 12TW3-D4

  • JL Audio 12TW3-D4

  • JL Audio 12TW3-D4

  • JL Audio 12TW3-D4

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Our take on the JL Audio 12TW3-D4

by John Pollard
JL Audio

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Bass for challenging spaces

If you've got a pickup truck, sports car, or you just need to haul a lot of stuff, then you know that adding some bass can be a challenge. That's why JL Audio built the TW3 Series 12TW3-D4 shallow-mount subwoofer. This super-thin 12" sub puts out big bass, yet only requires minimum air space, so you can use a much smaller enclosure. Now, you can have your bass and your space too.

JL Audio 12TW3-D4

Don't let this sub's low profile fool you, it's made for big bass.

JL Audio's amazing engineering

JL Audio used all their tricks to build a sub this slender without giving up performance. Its tough polypropylene cone won't flex under high power, and the large, durable rubber surround helps the cone move large amounts of air. The heavy-duty cast-alloy frame only stands 3-1/2" tall, but provides a stable home for this high-performance bass driver. For best results, you'll want to send this sub up to 400 watts RMS, and its dual 4-ohm voice coils make it a perfect match for a mono amplifier. 

See more info on this item

Highlights:

  • 12" subwoofer with dual 4-ohm voice coils
  • shallow-mount design with small airspace requirements
  • mica-filled polypropylene cone with rubber surround
  • cast alloy basket
  • top-mount depth: 3-1/2"
  • power range: 100-400 watts RMS
  • peak power handling: 800 watts
  • frequency response: 22-200 Hz
  • sensitivity: 82.1 dB
  • sealed box volume: 0.75 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Size
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12 -inch
Impedance
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4 ohms
Cone Material
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Mica-filled IMPP
Surround Material
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Rubber
Ideal Sealed Box Volume (cubic feet)
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0.8
Ideal Ported Box Volume (cubic feet)
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N/A
Port diameter (inches)
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N/A
Port length (inches)
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N/A
Free-Air
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No
Dual Voice Coil
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Yes
Sensitivity
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84.11 dB at 1 watt
Frequency Response
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22 - 200 Hz
RMS Power Range (Watts)
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100-400
Peak Power Handling (Watts)
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800
Top Mount Depth (inches)
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3 1/2
Bottom Mount Depth (inches)
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N/A
Cutout Diameter or Length (inches)
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11 5/8
Vas (liters)
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48.73
Fs (Hz)
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26.46
Qts
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0.531
Xmax (millimeters)
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15.2
Parts Warranty
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1 Year
Labor Warranty
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1 Year
Product Research
What's in the box?

Download owner's manual

  • 12" Thin-Line subwoofer
  • Owner's manual
  • Voice coil connection warning

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 open the box, verify contents, 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.

Features
Enclosure Compatibility

Features

Thin-Line Design: JL Audio's patented thin-line woofer technology compresses the architecture of the 12TW3-D4 subwoofer and allows it to deliver great bass performance in tight space applications (less than 3-1/2" deep). Central to the technology is the Concentric Tube structure that supports the oversized voice coil and the suspension attachments. This permits placing the motor structure much further forward in the speaker than conventional designs, while maintaining excellent linear excursion capability. Equally important, the 12TW3-D4 is designed for extremely small enclosure applications; 0.8 ft³ is optimum.

Concentric Tube Suspension: JL Audio's patented Concentric Tube Suspension employs a molded structure which spans beyond the edge of the motor structure, supporting the spider on the outside of the motor's boundaries and the large diameter voice coil on the inside. The large voice coil permits the magnet to sit inside it, rather than surrounding the coil as is typical in most woofers. The concentric tube structure and the elimination of a conventional top-plate helps JL Audio place the motor higher up into the cone body's space to further compress depth, while still permitting excellent mechanical excursion.

Mica-Filled Polypropylene Woofer: The subwoofer features an injection-molded, mica-filled polypropylene cone woofer with 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, the 12TW3-D4 motor remains linear over a long excursion range, and also maintains 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.

Enclosure Compatibility

Recommended Sealed Box Volume: The sealed box size recommended by JL Audio is 0.8 ft³. A diagram is provided in the owner's manual for a sealed box with external dimensions of 21-1/4" W x 16" H x 6-1/2" D, assuming 3/4" thick material. (If you are using 5/8" thick materials, subtract 1/4" from each dimension.)

Shallow Mount Design: The JL Audio 12TW3-D4 requires a mounting depth of less than 3-1/2".

 
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JL Audio 12TW3-D4 Reviews

Average Customer Review:

4 people say:

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Filter by rating:
5 out of 5

impressed

Written By efrain, howey in the hills, fl on Wednesday, August 13, 2014
Crutchfield Customer Review (What's this?)
 
Sub sounds great for size.
Pros:
Everything
Cons:
Nothing
1 out of 2 people found this helpful
Was this review helpful?    Yes | No
"Coolness Factor"
Build Quality
Ease of Use
Sound Quality
Value
 
5 out of 5

Crutchfield THE Best !!

Written By Fernando, San Gabriel CA on Sunday, May 11, 2014
Crutchfield Customer Review (What's this?)
 
JL The best on subwoofer , I have tried quite a few different brands and shallow subs on the market and this is the best I have ever own and it hasn't been break in YET so that goes to tell you how good this sub is although it's a bit pricey , but you get what u pay for and that's QUALITY and on top of that you can add the tech support from Crutchfield for life and in my experience with them since 2006 THERES NO other place with the quality items and treatment to clients like them and trust me when I'm saying that I have order and still do from websites that are based here in CA , FL and NY that I rather not mention names cause I still order from them small items specially here in CA as I get them over night as I live here too and used them to work on cars the next day but even though they are here , they don't update their availability and won't get ship or won't call u , email u to just let you know that the item is out of stock so you called them and they are so rude to you or they have already charge you for the item and they just tell you that they don't know when it will be in stock and of course it takes a week for them to reimbursed your money back to your credit card , unlike Crutchfield they have always been so so professionals too bad they are not in CA .
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"Coolness Factor"
Build Quality
Ease of Use
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Value
 
4 out of 5

Well spent money!

Written By Marco, Sunny isles, florida on Thursday, January 23, 2014
Crutchfield Customer Review (What's this?)
 
If you have the money to expend and are a sound enthusiast, definitely you must get this Sub. Excellent sound quality, state of the art design and materials. Perfect design for small enclosures. Fits even in the smallest boots.
Pros:
Shallow design. Excellent "Bose" bass sound quality. Excellent materials. Fits perfectly even in smaller cars or trucks. Easy to read instructions. (Enclosure and connections) Cool look.
Cons:
its a bit overpriced but you may survive to this after a few tracks.
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"Coolness Factor"
Build Quality
Ease of Use
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Value
 
5 out of 5

JL 12" TW3

Written By Anonymous, Harrisonburg, VA on Thursday, October 17, 2013
 
Amazing sound it a small package. Dont waste your time trying other shallow mount subs. There is only one real shallow mount that gives you the sound quality of a full size sub and JL sells it.
5 out of 5 people found this helpful
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"Coolness Factor"
Build Quality
Ease of Use
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Value
 

2 questions already asked

would a 1200 watt amp be alright for two of these subs? [ justin  Jul 26, 2014 ]
2 answers
  • You'd def be overpowering them like crazy if that's RMS power... Make sure you keep that gain down otherwise you'll blow them... [ Daniel   Jul 27, 2014 ]
  • Thanks for your question. For information on selecting the best amp for your subs 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. [ Greg Staff  Jul 26, 2014 ]
What amps paired well w/ these subs? [ Luis  May 01, 2014 ]
1 answer
  • Thanks for your question. For information on selecting the best amp for your subs 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. [ Krissy Staff  May 02, 2014 ]

Add accessories for the JL Audio 12TW3-D4

It's critical to have good wire, and none is included with the sub. See all categories & accessories

T-Spec 12-gauge Speaker Wire Black/white jacket — priced per foot
27 people say
Your Price: $1.99
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T-Spec 16-gauge Speaker Wire Black/white jacket — priced per foot
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Stinger PRO Series 16-gauge Speaker Wire Black jacket — priced per foot
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Dynamat Xtreme Trunk Kit 5 sheets, 20 square feet
12 people say
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Dynamat SuperLite Tri-Pak Triple package — 3 sheets, 12 square feet (Model #10612)
17 people say
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Dynamat 19100 License Frame Kit
15 people say
Your Price: $14.99
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Dynamat Xtreme Wedge Pack 1 sheet, 4 square feet
6 people say
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Dynamat Dynaliner One 54" x 32" sheet (1/8" thick)
6 people say
Your Price: $69.99
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JL Audio SGR-12TW3 Grille for TW3 Series 12" subwoofer
1 person says
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Metra Speaker Terminal Round terminal cup with binding post connectors (for do-it-yourself box builders)
13 people say
Your Price: $9.99
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Polyester Fiber Stuffing Make your subwoofer think it's in a bigger box (1-pound pack)
34 people say
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5 people say
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Metra Speaker Terminal Square terminal cup with binding post connectors (for do-it-yourself box builders)
7 people say
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4 people say
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Metra Speaker Terminal Round terminal cup with spring clip connectors (for do-it-yourself box builders)
5 people say
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2 people say
Your Price: $9.99
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Metra Speaker Terminal Square terminal cup with spring clip connectors (for do-it-yourself box builders)
7 people say
Your Price: $3.99
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S&G Wire Cutter/Stripper Tool Cuts and strips 12- to 22-gauge wire
14 people say
Your Price: $19.99
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Pro.Fit Wire Worm Installation tool helps route wiring through tight spaces
27 people say
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Autosound 2000 Disc One Low Frequency Test CD (Disc One)
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Autosound 2000 Disc Four Amplifier Optimizer Test CD
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For a more in-depth review and enhanced detailed information on the JL Audio 12TW3-D4, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_13612TW3/JL-Audio-12TW3-D4.html ).