JL Audio SB-GM-SLVD/10TW1/BK Stealthbox 10" 300W RMS (600W Peak Power Handling) 2 Ohms, Shallow Mount Car Subwoofer in Sealed Enclosure for 2014-2018 Chevrolet Silverado / GMC Sierra Double Cab Trucks with Jet Black or Dark Ash interior
We are a JL Audio authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!
What's Inside?
- • 10" Stealthbox Shallow Mount Car Subwoofer in Sealed Enclosure
- • (2) 10TW1-4 subwoofers in a sealed enclosure
- • (2) black steel mesh woofer grilles
- •Owner's manual
Why Choose JL Audio SB-GM-SLVD/10TW1/BK Stealthbox System?
Great Towing and Hauling Capabilities
Whether your GM truck is used to work hard or play even harder, it brings a whole lot to the table, including great towing and hauling capabilities, a spacious interior and a smooth ride.
JL Audio's Stealthbox® enhances your GM truck by adding quality JL Audio bass without losing much of your precious space or interior functionality.
Tested for Rugged, Long-Lasting Performance
JL Audio’s 10-inch marine subwoofer is durability-tested using UV and Salt Fog chambers to simulate years of sun and saltwater exposure, ensuring long-lasting performance. Premium components, including gold-plated marine-grade brass terminals and stainless steel mounting hardware, provide superior connectivity and reliability in harsh marine environments.
Frequently Asked Questions (FAQ)
- • Will this model fit a Chevrolet Silverado or GMC Sierra Crew Cab truck?
No. The \"SLVD\" model is custom-engineered exclusively for the shorter floor pan layout of 2014–2018 Double Cab (Extended Cab) trucks. It will not fit Crew Cab or Regular Cab models.
- • What interior color configuration does the \"BK\" suffix match in my GM truck?
The \"BK\" code signifies an Ebony / Jet Black finish. It is factory-carpet-matched to blend seamlessly with 2014–2018 trucks equipped with Jet Black or Dark Ash interior options.
- • What factory truck components must be permanently removed for installation?
You must fully unbolt and permanently remove the factory-installed plastic under-seat storage tray (if your truck has one) to allow the fiberglass box to rest flush against the floor.
- • What final wiring load impedance does this dual 10-inch enclosure present?
The enclosure features two 10TW1-4 thin-line subwoofers pre-wired together internally in a parallel configuration. The single terminal block outputs a final 2-ohm mono load.
- • What continuous amplifier power range is recommended to drive this system safely?
The combined continuous power handling capacity of the dual thin-line drivers is 600 watts RMS. Match the box with a monoblock car amplifier that delivers between 400W and 600W RMS cleanly at 2 ohms.
- • Will installing this enclosure prevent the rear seats from folding down or flip-up use?
No. JL Audio precision-molded the low-profile fiberglass housing so it rests entirely out of the way, meaning rear seat folding, flipping, and legroom remain 100% unaffected.
- • Do I need to buy protective speaker grilles separately to shield the woofers?
No. The enclosure is designed as an up-firing system and comes equipped with durable, heavy-duty steel mesh grilles pre-installed to safeguard both 10TW1 drivers from passenger seat contact.
- • Why does the sub-bass output seem heavily muted or lose punch at high volume?
The factory GM MyLink head unit uses aggressive internal equalization curves that strip away low-end bass frequencies as you increase the volume. An active line-output converter or integration module is required to deliver a flat signal.
Learn how to wire subwoofers

- Diameter : 10 Inch
- Impedance : 2 Ohm
- Peak Power Handling : 600 Watts
- Number Of Subwoofers : 2
- Vehicle Make : Chevrolet
- Vehicle Make : GMC
- RMS Power Handling : 300 Watts
Features:
- Dual High-Performance Subwoofers: Two 10TW1-4 subwoofers with injection-molded, mica-filled polypropylene cones, rubber surrounds, DMA-optimized motor design, and patented floating cone attach method for precise, distortion-free bass.
- Power & Sensitivity: RMS 600 watts total (300 watts each), recommended 150–600 watts RMS, wired to a 2-Ohm load, 10 mm Xmax, and 82.2 dB sensitivity for efficient, high-output performance.
- Compact Sealed Enclosure: Extremely small volume requirements, sealed fiberglass enclosure with no pole vent allows mounting close to the rear wall of the enclosure; up-firing design for optimal sound dispersion.
- Vehicle-Specific Fit: Designed for 2014-Up Chevrolet Silverado / GMC Sierra Double Cab trucks with Ebony interior. Installs under rear seat without affecting seat folding or rear legroom; may require removal of plastic storage tray. Not compatible with Crew Cab or Standard Cab.
- Durable & Secure Construction: Cast alloy frames with flat edges for tight driver grouping, steel mesh grille included, binding post terminals, patented concentric tube architecture, and elevated frame cooling for long-lasting reliability.
- Optional Matching Amplifier: Works seamlessly with JL Audio XD600/1v2 for optimized system performance.
- OEM-Style Finish: Ebony color match grade “Good” for a clean, integrated appearance.
Specifications:
- Series: TW1 Series
- Subwoofer Design: Round / Circle
- Voice Coil(s): Single
- Impedance (Per Voice Coil): 4?Ohms
- RMS Power Handling: 300?W
- Total RMS Power Handling: 600?W
- Woofer Surround: Rubber
- Woofer Composition: Mica-Injected Polypropylene (MIPP)
- Sensitivity: 82.2?dB
- Frequency Response: 26–200?Hz
- Xmax: 10?mm
- Subwoofer Size: 10"
- Number of Subwoofers: 2
- Box Style/Shape: Underseat
- Wood Thickness: 3/4"
- Number of Terminals: 1
- Terminal Type: Binding Posts
- Box Exterior Color: Ebony
- Box Finish: Carpet
- Final Wired Impedance: 2?Ohms
- Type of Enclosure: Loaded
- Box Type: Sealed
- UPC: 699440946124
- Weight: 30
- 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.