JL Audio Stealthbox® SB-F-150-SCDBL/12TW3/BK

Custom fit subwoofer enclosure for 2009-2023 Ford F-150, F-250 Super Duty, F-350 Super Duty

JL Audio
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• 2009-Up Ford F-150 SuperCrew / 2017-Up SuperDuty Crew Cab
• 800 Watt Power Handling
• Two 12" JL Audio Subwoofers
• Does not affect folding or reclining seat
• All Fiberglass Enclosure

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JL Audio

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The Ford F-150 is an American icon with impressive hauling capabilities and a spacious interior, especially in SuperCrew configurations. Unfortunately, Ford’s factory sound systems leave a lot to be desired in the low frequency department.
The JL Stealthbox for F-150 SuperCrew and SuperDuty Crew Cab trucks fills your truck with stunning sub bass output and quality, with no intrusion on cab space. Featuring an all-fiberglass, sealed enclosure design, this Stealthbox houses two of revolutionary 12TW3 thin-line subwoofers and installs neatly under the rear seat, without compromising rear seat comfort.

General Features:

  • Contains two 12TW3-D8 subwoofers in a sealed enclosure
  • Compatible with 2009-2023 Ford F-150, F-250 Super Duty, F-350 Super Duty
  • 800 watt power handling
  • Wired for 2 ohm mono
  • Installs under rear bench seat and requires removal of under-seat storage tray, if so equipped
  • Installation requires removal of OEM “subwoofer”, if so equipped
  • Does not affect folding or reclining of seat
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty

Subwoofer Features

  • Includes two 12" TW3 (Thin-Line) Series Shallow Mount Subwoofers
  • Power Handling:
    • RMS: 400 watts each
  • Impedance: Dual 8-Ohm
  • Injection molded, mica-filled polypropylene cone
  • Rubber surround
  • No pole vent: permits mounting close to rear wall of enclosure.
  • Very long linear excursion capability
  • DMA-optimized motor designs
  • Patented “concentric tube” architecture
  • Patented “floating cone attach method” technology
  • Cast alloy frame
  • Precision-built in the USA at JL Audio’s Miramar, Florida factory
  • Mounting depth: 3.5 "
  • Cutout dimensions: 11.625 "
  • Free Air Resonance (Fs): 32.660 Hz
  • Sensitivity: 82.23 dB
  • Xmax: 15.2 mm
  • Equivalent Compliance (Vas): 34.12 L
  • Frequency response: ~24 ~ 200 Hz
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty

JL Audio 12TW3-D8 owner’s manual

Compatible Vehicles

Please use our Fitment Guide to determine specific compatibility for the submodel and audio features

  • 2009 Ford F-150
  • 2010 Ford F-150
  • 2011 Ford F-150
  • 2012 Ford F-150
  • 2013 Ford F-150
  • 2014 Ford F-150
  • 2015 Ford F-150
  • 2016 Ford F-150
  • 2017 Ford F-150
  • 2017 Ford F-250 Super Duty
  • 2017 Ford F-350 Super Duty
  • 2018 Ford F-150
  • 2018 Ford F-250 Super Duty
  • 2018 Ford F-350 Super Duty
  • 2019 Ford F-150
  • 2019 Ford F-250 Super Duty
  • 2019 Ford F-350 Super Duty
  • 2020 Ford F-150
  • 2020 Ford F-250 Super Duty
  • 2020 Ford F-350 Super Duty
  • 2021 Ford F-150
  • 2021 Ford F-250 Super Duty
  • 2021 Ford F-350 Super Duty
  • 2022 Ford F-150
  • 2022 Ford F-250 Super Duty
  • 2022 Ford F-350 Super Duty
  • 2023 Ford F-150

Specifications & Details

Subwoofer Specifications
TW3 Shallow Mount Series
Subwoofer Design
Round / Circle
Voice Coil(s)
Impedance (Per Voice Coil)
8 ohms
RMS Power Handling
800 watts
Total RMS Power Handling
800 watts
Peak Power Handling
800 watts
Total Peak Power Handling
800 watts
Woofer Surround
Woofer Composition
Mica Injected Polypropylene - MIPP
84.23 dB
Xmax (millimeters)
15.2 mm
Subwoofer Size
Enclosure Specifications
Number of Subwoofers
Box Style/Shape
Vehicle Specific
Number of Terminals
Terminal Type
Spring posts
Box Exterior Color
Box Finish
Final Wired Impedance
Type of Enclosure
Box Type
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider

Item Details


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Customer Ratings & Reviews

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Customer Reviews

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Jl Audio F150 Stealthbox (JL Audio SB-F-150-SCDBL/12TW3/BK)

My setup:

Subs : (2 12" 12TW3D-8's in 2018 F150 JL Audio Sub Box.) : powered by JL HD1200
Speakers : Front : JL C#650 2 way component ; Rear : JL C2 650 Coaxial for rear fill. : powered by JL VXI 400/4 ( using Tun software for all)

Did 2 months of research, 4-5 hours a day. Anywhere from caraudio.com senior members, every review online, numerous certified install audio shops : you name it, I did the research.

For the 1st month, I was sold on the Foxbox with 2 10" 10W3V3's that the dealer recommnded for me. After numerous delays, and great reviews on the stealthbox, I decided to pony up to get my project finished and cancel the Foxbox. One installer told me that the 12TW3's while not rated quite as high as the non shallow 10's, would outperfrom the 10's and be more crisp as well.

I am coming from 2 Rockford T Power 12's in a sedan, and this Stealthbox almost hits as hard, if not as hard. Very good SQL, especially for sliding under my rear seat and taking up no room. I am about to change out my factory radio for a Kenwood Excelon reference 1057 and that should really crank up the quality on everything.

TL;DR : this box is hands down the best option for a truck/F-150. I like quality, and I like power. I am a musician, better yet, a drummer. This thing delivers on both levels, quality and power, but give it the juice it deserves. JL recommends a 750W amp for it, I say do 1000 at least. These are power hungry and can handle it. I've barely scratched the surface with what it can do mainly because there is absolutely no need. Buy it! It's made by JL, for JL subs, for the F-150....what else do you want?

By Tim on October 21, 2020


found this helpful.

By Michael on June 3, 2023 checkmarkIcon Verified purchase


found this helpful.

Best of the best great service I would recommend them

Great service and super fast iam very happy thanks again

By Alejandro on June 14, 2022 checkmarkIcon Verified purchase


found this helpful.

2023 Ford Raptor

Fits just fine in the 23 Ford Raptor. Seems to sound decent.

By Shane on September 16, 2023 checkmarkIcon Verified purchase

By Andrew on September 8, 2023 checkmarkIcon Verified purchase

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