JL Audio SB-F-SUPRCC/13TW5v2/BK Stealthbox 13.5" 600W RMS (1200W Peak Power Handling) 2 Ohms, Shallow Mount Component Car Subwoofer in Sealed Enclosure for 2004-2016 SuperDuty Crew Cab with FlexFold 60/40 split bench rear seat and Black (leather) interior
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What's Inside?
- • 13.5" Stealthbox Shallow Mount Component Car Subwoofer in Sealed Enclosure
- • Owner's Manual
Why Choose JL Audio SB-F-SUPRCC/13TW5v2/BK Stealthbox System?
Don't Let Convention Get in the Way of Creating Outstanding Sub-bass
Ford's big trucks were designed to haul people and serious payloads with ease. They also present a tough challenge for a conventional subwoofer solution due to a severe shortage of unused space in the cab. It's a good thing JL Audio doesn't let convention get in the way of creating outstanding sub-bass.
They now offer two clever Stealthbox® solutions for Ford's biggest hauler: one that installs inside the center console and this one: a super-thin, all fiberglass enclosure loaded with JL Audio's revolutionary 13TW5v2 subwoofer and designed to install under the rear bench seat. So, if your console space is non-negotiable, you can still get world-class sub-bass that remains invisible and doesn't compromise your truck's people space.
Contains one 13TW5v2-2 Subwoofer In a Sealed Enclosure
Whether your miles pile up towing a boat or using your truck for work, you can now enjoy every one of them with one of their Stealthbox® solutions. The Hard Data: Contains one 13TW5v2-2 subwoofer in a sealed enclosure. 600 watt power handling. Wired for 2 ohm mono. Installs under driver side of rear bench seat. Does not affect folding or reclining of seat. Stealthbox® products are built to order and therefore non-refundable.
Frequently Asked Questions (FAQ)
- • Will this under-seat Stealthbox fit into a Ford Super Duty SuperCab (Extended Cab)?
No. This enclosure is contour-molded strictly to fit the larger under-seat floor geometry of 2017-Up Ford F-250 / F-350 Crew Cab models. It will not physically clear an extended cab layout.
- • What factory truck components must be removed from under the rear seat before installation?
You must completely unbolt and permanently remove the collapsible factory under-seat plastic storage tray and the OEM subwoofer assembly to allow the large fiberglass shell to drop down flush.
- • Why does the bottom of my rear seat cushion rub hard against the top of the box?
This occurs if the provided metal seat lift spacer brackets are omitted during installation. You must install these spacers to slightly raise the rear seat assembly for proper clearance over the 13.5-inch driver.
- • What final wiring load impedance does this massive 13.5-inch box present to an amp?
The enclosure features a premium 13TW5v2-2 thin-line subwoofer pre-wired to the external connection cup, presenting a single 2-ohm mono load to your amplifier.
- • What is the continuous RMS power requirement to safely drive this premium thin-line sub?
The high-excursion 13TW5v2 driver is rated for 600 watts continuous RMS power. For optimal headroom and clean performance, pair the box with a high-end monoblock amp pushing 500W to 600W RMS at 2 ohms.
- • Does installing this low-profile enclosure limit the rear seat folding or flip-up functionality?
No. Thanks to the precise molding and the included seat spacers, your rear seats will still comfortably lock down into place for passengers and flip up fully against the back wall exactly like stock.
- • Why does the sub-bass output seem severely muted or clip quickly at higher volumes?
The factory Ford Sync head unit rolls off low frequencies heavily at upper volumes to prevent damage to small stock speakers. You must deploy an active integration interface (such as a PAC AmpPro) to clear up the signal.
- • Why am I hearing a severe vibration or metal rattle from the back floor during bass drops?
The intense energy of the 13.5-inch driver can cause loose seat belt anchors or the floor pan to resonate. Placing the enclosure tightly over a sheet of butyl sound-damping material completely eliminates the rattle.
Learn how to wire subwoofers

- Diameter : 13.5 Inch
- Sensitivity : 85.63 dB
- Impedance : 2 Ohm
- Frequency Response : 20-200 Hz
- Peak Power Handling : 1200 Watts
- Number Of Subwoofers : 1
- Enclosure Type : Sealed
- Vehicle Make : Ford
- RMS Power Handling : 600 Watts
Features:
- World-Class Under-Seat Bass: Houses a JL Audio 13TW5v2-2 subwoofer delivering powerful, tight low-end without taking up cabin or console space.
- Vehicle-Specific Fit: Designed for Ford SuperDuty trucks with rear bench seats, ensuring seamless integration under the driver’s side.
- Sealed Fiberglass Enclosure: Super-thin, all-fiberglass design fits in tight spaces while producing impressive sub-bass performance.
- Maintains Seat Functionality: Folding and reclining of the rear bench seat remain unaffected, preserving passenger comfort and practicality.
- Compact, High-Performance Design: Uses thin-line woofer technology with patented “concentric tube” architecture for maximum linear excursion in minimal enclosure volume.
- Stealth Installation: Remains invisible once installed, keeping your truck interior clean and uncluttered while delivering audiophile-quality bass.
- Durable & Rugged Construction: Built to handle real-world driving, towing, and work conditions without compromise.
- Optimized for Tight Spaces: Unique woofer design allows large motor placement in a small enclosure, producing 12-inch-level performance in a footprint slightly larger than a 10-inch box.
Specifications:
- Power Handling: 600W RMS
- Impedance: Wired for 2-ohm mono
- Enclosure Type: Sealed fiberglass, under rear bench seat
- Frequency Response: 20–200 Hz
- Sensitivity: 85.51 dB
- Xmax: 11 mm
- Construction: Mica-filled polypropylene cone, Santoprene surround, cast alloy basket, patented concentric tube architecture, DMA-optimized motor
- UPC: 699440944151
- Weight: 40
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.