Top Rated 12 inch 4000-watt DVC Subwoofer

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The JBL® W12GTi MkII 12-inch (300mm) subwoofer is nothing short of amazing. Using technology from JBL’s professional audio division, where subwoofers have to fill large venues like stadiums and movie theaters with incredible bass, this subwoofer takes a completely new approach to moving air in a car. It all starts around the patented Differential Drive® Design (US patent no 5,748,760 and other patents pending) motor, which uses light and agile opposed 3-inch (76-millimeter) voice coils in a neodymium magnetic gap to provide completely linear control of cone excursion all the way up to Xmax. Symmetrical Field Geometry™ design ensures linear cone travel and low distortion at virtually any output level. Surrounding the proprietary motor design are other high-tech materials, including a cast-aluminum frame, Kevlar® cone, a nitrile butadiene rubber (NBR) one-piece surround, gold-plated speaker-terminal binding posts, progressive spider and vented pole piece. This subwoofer handles an amazing 4,000 watts peak power (700 watts RMS), and all of its parts work in harmony to cool the voice coils for maximum output. This sub is one of the best car subwoofers that money can buy. It’s the 12-inch reference standard. Nothing else even comes close.

What's in the box?

  • 1 W12GTi MkII subwoofer
  • 8 10/24 machine screws
  • 8 T-nuts
  • Enclosure design sheet
  • Owner’s manual

JBL engineers designed the W12 GTi MkII subwoofer to produce uncompromising, mammoth bass from an amplifier capable of delivering up to 4000 watts of power. This is nothing short of incredible. What’s more incredible is not just how much power this subwoofer can handle but how it handles the power by using patented, high-tech materials. In the end, this sub is the 12-inch (300-millimeter) reference standard for car audio subwoofer technology. Nothing else even comes close.

JBL W12GTi MkII subwoofers employ Differential Drive Design (DDD), a patented technology developed by the JBL Professional Audio Division. Differential Drive Design employs two 3-inch (76-millimeter) voice coils, each suspended in a separate magnetic gap. At low power, both voice coils drive the subwoofer’s cone, and any motor nonlinearities are cancelled. As power input increases so that one coil rides completely out of its gap, the other coil still applies force to the cone for significantly higher power handling.

One of the breakthroughs in speaker design is the use of neodymium instead of heavier ferrite materials. Typically, audio makers use small amounts of neodymium in tweeters and midrange drivers. JBL engineers use generous amounts of neodymium in the W12GTi MkII subwoofer to ensure much greater magnetic-energy density. As a result, this subwoofer provides superbly accurate cone movements. It delivers a high degree of control that is virtually without comparison among car subwoofers.

The Kevlar fiber is a well-known composite material that the military and law enforcement use for bulletproof vests and combat helmets. JBL W12GTi MkII subwoofer uses this rugged material in its cone. Since Kevlar material is extremely lightweight yet rigid and stiff, it’s the ideal cone material to move large amounts of air without flex or distortion.

Nitrile butadiene rubber – commonly known as NBR – is a tough industrial gasket material. W12GTi MkII subwoofers use a single-piece surround and mounting NBR gasket that provides a complete seal between the front and back of the subwoofer – an essential design feature when you consider the high pressure levels that develop within subwoofer enclosures. NBR is also environmentally stable under a wide range of conditions and temperatures, which ensures that the subwoofer will replay sound in your car equally well during the summer or winter.

JBL engineers designed the W12GTi MkII subwoofer’s proprietary die-cast aluminum frame from the ground up. Unlike the “off the shelf” frames in some other subwoofers, this sub’s aluminum frame features significant venting and heatsink fins to add power handling. And since aluminum is a rigid material, it keeps the critical voice-coil components in perfect alignment while they travel through the linear-excursion range.

The W12GTi MkII subwoofer’s progressive spider provides restoring force to the cone in varying degrees, depending on the amount of excursion – hence the name progressive. The spider allows the cone to move easily under subtle music conditions, which results in a more musical subwoofer. By progressively adding more restoring force as movement increases, the spider ensures that the cone travel is always controlled, under even the highest excursion conditions.

Conventional dual-voice-coil woofers use a pair of voice coils wound on the former and layered over the top of one another, and then both voice coils are centered in the speaker’s magnetic gap. The W12GTi MkII subwoofer’s voice coils rely on a push-pull system, each using its own magnetic gap. The two coils may be connected in series or in parallel to maximize an amplifier’s output power. A Differential Drive Design (DDD) motor relies upon magnetic braking, which prevents damage from over-excursion.

Tinsel leads carry ab audio signal into the voice coil. Because the W12GTi MkII subwoofer’s tinsel leads are fully insulated, you need not worry about any arcing or electrical shorts. It’s just one more detail that makes this subwoofer such a mechanical wonder.

The W12GTi MkII 10-inch (250-millimeter) subwoofer features rugged, gold-plated binding posts for the speaker-wire connectors that accept the large-gauge wire commonly associated with high-power subwoofers. With positive terminals placed on one side and negative terminals on the other, this subwoofer features a unique jumper system: A single input terminal connection is needed for parallel (3-ohm) or series (12-ohm) configurations.

Peak Power
Power Handling (Peak)
Nominal Impedance
3 or 12 ohms
Frequency Response
18Hz–1kHz ±3dB
Power Handling (RMS)
(2.83V@1m) 91dB
Mounting Depth (in)
Mounting Cutout Diameter (mm)
Mounting Depth (mm)
External Diameter (mm)
External Diameter (in)
Mounting Cutout Diameter (in)
Driver Radiating Area
(Sd – in2/cm2) 74.3/480
Magnetic Gap Height
(Hag – in/mm) 1.0/25.4
Voice Inductance
(Levc – mH) 0.75 (parallel VC connection)
Voice Coil Height
(Hvc – in/mm) 2.6/66.04
Suspension Compliance
(Cms – ?m/N) 135.28
Voice Coil
vDual 6-ohm Differential Drive®, 3" (76mm) diameter
Compliance Volume
(Vas – ft3 / l) 1.58/44.75
Maximum Excursion
(Xmax –in/mm) 0.8/20.32
Vented Polepiece
Progressive Spider
Nitrile-butylene rubber – one-piece with gasket
Low-Frequency Transducer
12" (305mm) Kevlar®-impregnated paper cone
Total Q
(Qts) 0.51
Diecast Aluminum Frame
Yes (vented)
Motor Force Factor
(Bl – Tm) 14.64 (parallel VC connection)
Electrical Q
(Qes) 0.55
Voice Coil DC Resistance
(Revc – ohms) 3.2 (parallel VC connection)
Mechanical Q
Q (Qms) 6.68

3 Year Warranty

Products purchased online or from an authorized local retailer and under warranty may qualify for an exchange with a valid receipt.

Purchases made from an unauthorized dealer will not be eligible for exchange.

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W12GTi MkII is rated 4.428571428571429 out of 5 by 7.
Rated 5 out of 5 by from AAA+ I have been building car audio sub woofer enclosures since 1985 and in that time I have had the chance to play with almost every car audio sub ever made. These Wgti subs are still by far my favorite sound quality woofer , I listen to my music loud push my system hard daily for 1 to 2 hours at a time and these things never miss a beat or mud a single note, the note separation and articulation of this woofer is second to none , the guitar strings and drums SNAP like they each have their own source ..... if these woofers don't drop your jaw they were installed wrong ( very wrong ) I am running two 12" powered by a Crown BPX 2200.1 and I have 2 enclosures that I am bouncing back and forth with 4.0cf3 tuned at 28hz and 4.0cf3 tuned at 30hz and I think I'll be sticking with the 28hz enclosure once I add midbass it's really too bad they are now a discontinued product , I'v enjoyed working with them not shure what I'll do once I wear these ones out though everything else is a downgrade IMO
Date published: 2016-06-09
Rated 5 out of 5 by from Absolutely insane... I did not know one could experience too much bass. How sadly mistaken, I was. I wired it up by the 3 ohm configuration through a 2 cubic-yard labyrinth box, and a 3k watt amp (1500 rms)... I could not find enough settings to drop to minimum and turn off for my ears to stop bleeding. Rewired down to 12 ohms and now its the purest, delicious bass you can imagine. If i ever need to blow the clothing off an entire stadium of people, i'll go back to 3 ohms. Feels good knowing i've got that much headroom, actually. And with the lower-power configuration, everything stays blissfully cool with no interruption to performance or my car's lights (yes, the 3 ohm config dimmed my lights with the lower bass. lol.). Buy it. Buy it now.
Date published: 2016-01-04
Rated 5 out of 5 by from The best subwoofer ever I love it, excellent. It is not comparable to any subwoofer. A unique design
Date published: 2015-08-29
Rated 5 out of 5 by from I believe these subs are the best on the market I changed my systems from Polk which I loved and thought I would try JBL. I believe I have falling in love all over again because I am totally blown away by the clarity of my system which consist of P660c, gto329, p662, p963, 3each w12gti wkii subs, gto1001ez sub amp and gto 840ez 4 channel amp AWESOME!"
Date published: 2013-08-02
Rated 5 out of 5 by from Ultimate Sub Having played around with many subs from different brands(many high end)this GTi sub is by far the most musical subwoofer I have ever used.Stunning attack,phenomenal low end without any hints of struggle.Powering this sub using JBL Crown amps puts it on a whole different level.If you are looking for the ultimate sound quality or ground shaking SPL subwoofer,I'd highly recommend the GTi series of subs.
Date published: 2013-05-28
Rated 5 out of 5 by from Truly amazing! I've always bought jbl subs and this is defiantly the best sub I've ever owned. It is truly amazing crisp loud and clear great subwoofer!
Date published: 2013-02-17
Rated 1 out of 5 by from You subwooferror didn't work right and I had it professionally installed.
Date published: 2016-04-12
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Can I run this speaker at 12ohms with a jbl gto14001 amplifier?

Asked by: Kali
Absolutely. Connect the voice coils in series and you're good to go.
Answered by: Joe G at Customer Service
Date published: 2016-09-05

Are you going to be getting more of these in stock or are they being discontinued?

Asked by: marks
Unfortunately, the W12GTi MkII is already being discontinued and we are not expecting stocks to be replenished.
Answered by: Amir at Customer Service
Date published: 2016-06-01

How many cubic feet should an enclosure be for 2 of these

Asked by: Cade
Assuming you are building a sealed enclosure, 1 cubic foot is recommended for 1 speaker. If you are running 2 speakers in the same box, all you have to do is double the space, making it 2 cubic feet.
Answered by: Joe G at Customer Service
Date published: 2016-05-06

Is a sealed enclosure recommended over a vented one? If so how much airspace should an enclosure of each type allow for this woofer?

Asked by: TyLane14
Thank you for your question, this would be a user specific question.. depending on the genre or music you are playing can vary on different boxes and types.. ex.. if you listen to hip hop, heavy bass you would want a vented speaker box.. for Jazz and easy listening sealed box would be good for bass to roll out.
Answered by: Randy at JBL
Date published: 2016-04-01

What is the best amp for this sub

Asked by: Binzz
Thank you for your question, you can use the GTR 1001 amplifiers
Answered by: Randy at JBL
Date published: 2016-03-07

What kind of box will I need for this sub to reach it's full potential

Asked by: xavier
Thank you for your question here is the Box parameters THIELE-SMALL PARAMETERS VOICE COIL DC RESISTANCE: REVC (OHMS)* . . . . . 3.20 VOICE COIL INDUCTANCE @ 1 KHZ: LEVC (MH)* . . . . . . 0.75 DRIVER RADIATING AREA: SD (FT2) . . . . . . . . 0.516 SD (M2) . . . . . . . . 0.048 MOTOR FORCE FACTOR: BL (TM)* . . . . . . . 14.64 COMPLIANCE VOLUME: VAS (FT3) . . . . . . . . 1.58 VAS (LITERS) . . . . . 44.75 SUSPENSION COMPLIANCE: CMS (µM/N) . . . . 135.28 MOVING MASS, AIR LOAD: MMS (GRAMS). . . . 184.80 MOVING MASS, DIAPHRAGM: MMD (GRAMS) . . . 178.72 FREE-AIR RESONANCE: FS (HZ) . . . . . . . . 31.83 MECHANICAL Q: QMS . . . . . . . . . . . 6.68 ELECTRICAL Q: QES . . . . . . . . . . . . 0.55 TOTAL Q: QTS . . . . . . . . . . . . 0.51 MAGNETIC-GAP HEIGHT: HAG (IN) . . . . . . . . . 1.00 HAG (MM) . . . . . . . 25.40 VOICE-COIL HEIGHT: HVC (IN) . . . . . . . . . 2.60 HVC (MM) . . . . . . . 66.04 MAXIMUM EXCURSION: XMAX (IN) . . . . . . . .0.80 (ONE-WAY LINEAR) XMAX (MM) . . . . . . 20.32
Answered by: Randy at JBL
Date published: 2016-02-16

How deep is this speaker 

Asked by: Shawndod 259
Hello, Thank you for your inquiry. This is the information you requested. Mounting Dept: 10-1/4" (260mm) Best Regards.
Answered by: Zoltan
Date published: 2016-09-12
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