If you’re shopping for sub boxes that fit behind a truck seat or under a rear seat, these options are designed to maximize bass while preserving cabin space. The picks below emphasize sealed or ported enclosures, compatibility with popular crew cab and extended cab configurations, and straightforward installation. They’re aimed at buyers who want a solid, no-nonsense upgrade to their factory audio without extensive modification. The top five selections cover dual and quad sub configurations, slim designs, and under-seat options for a clean, compact setup.
Summary table of chosen products:
| Product | Type | Best For | Notes |
|---|---|---|---|
| Skar Audio Dual 12″ Loaded Sealed Subwoofer Enclosure (Dodge Ram) | Sealed, Dual 12″ | Under rear seat, Dodge Ram 2002-2018 | Down-firing option, compact fit |
| Skar Audio Quad 8″ Loaded Ported Subwoofer Enclosure (Chevy Silverado / GMC Sierra) | Ported, Quad 8″ | Crew cab, modern GM trucks | Front-firing, higher woofer count |
| Skar Audio Dual 12″ Loaded Subwoofer Enclosure (Ford F-150 SuperCrew) | Down-firing, Dual 12″ | Ford F-150 SuperCrew behind rear seat | High power handling |
| Skar Audio Dual 12″ Loaded Ported Subwoofer Enclosure (Chevrolet Silverado / GMC Sierra) | Ported, Dual 12″ | GM crew cabs after 2019 | Under-seat fit with dual 12″ subs |
| Q Power 10 Inch Single Slim Truck Shallow Sealed Sub Box | Sealed, 10″ | Slim behind single cab or extended cab | Very shallow profile |
Skar Audio Dual 12″ Loaded Sealed Subwoofer Enclosure for Dodge Ram
Product type and compatibility: Dual 12-inch, 1600 Watt Max Power, sealed enclosure. Designed to fit Dodge Ram Quad/Crew Cab trucks from 2002 to 2018 and install under the rear seat. It ships with two VD-12 D4 12″ subwoofers (dual 4-ohm) rated to 800 Watts each for a robust bass presence. This option favors buyers seeking tight, controlled bass with minimal port noise in a sealed design. Best for riders who prioritize accuracy and clean bass in a compact, under-seat package.
Who it’s best for and why: Ideal for Dodge Ram owners who want a sealed, compact enclosure that sits neatly under the rear seat without intruding into cargo space. Its dual 12″ setup provides substantial low-end extension while maintaining a tight, punchy response. A potential limitation is sealing discipline; ensure correct airspace and mounting to prevent accidental air leaks that can affect efficiency.
Skar Audio Quad 8″ Loaded Ported Subwoofer Enclosure (Chevy Silverado / GMC Sierra)
Product type and compatibility: Quad 8-inch, 3200 Watt Max Power, ported, front-firing enclosure. Compatible with 2019-2026 Chevy Silverado and GMC Sierra Crew Cab trucks. Features four Skar Audio SVR-8 D2 8″ subwoofers (dual 2-ohm) with 800 Watt Max Power each. This option is best for buyers seeking a high-output, multi-driver setup that emphasizes loud bass with a front-facing design that still fits behind a crew cab seat.
Who it’s best for and why: Better for drivers who want a more thunderous, stadium-like bass impact without a full custom install. Choose this if you have a crew cab GM pickup and want to maximize wattage and SPL. One trade-off is potential space usage; quad 8″ drivers require more physical space than a single or dual 12″ enclosure.
Skar Audio Dual 12″ Loaded Subwoofer Enclosure (Ford F-150 2015-2026)
Product type and compatibility: Dual 12-inch, 1600 Watt Max Power, down-firing sealed enclosure. Designed for 2015-2026 Ford F-150 SuperCrew Cab trucks and fits under the rear seat of the cab. Includes two VD-12 D4 12″ dual 4-ohm subwoofers rated at 800 Watts each. It offers strong, controlled bass with a compact footprint suitable for Ford pickups that require a compact under-seat solution.
Who it’s best for and why: Best for Ford F-150 owners who want a strong sealed build that won’t dominate trunk space. The down-firing design helps distribute bass under seat, but placement accuracy matters to prevent air leaks from diminishing performance. Avoid if you need maximum rear-seat space for passengers.
Skar Audio Dual 12″ Loaded Ported Subwoofer Enclosure (Chevrolet Silverado / GMC Sierra)
Product type and compatibility: Dual 12-inch, 1600 Watt Max Power, down-firing, ported enclosure. Fits 2019-2026 Chevy Silverado and GMC Sierra Crew Cab trucks under rear seats. Features two VD-12 D4 12″ dual 4-ohm subwoofers with an 800 Watt Max each. This model combines robust low-end output with a compact fit for GM crew cabs, making it a strong choice for those who prefer ported enclosures for higher efficiency.
Who it’s best for and why: Suitable for GM crew cab owners who want louder, more resonant bass than sealed options. Choose this if you want more perceived bass volume and a warmer low end. A limitation to consider is that ported designs can be more sensitive to enclosure dimensions and vehicle interior acoustics, so proper mounting is essential.
Q Power 10 Inch Single Slim Truck Shallow Sealed Subwoofer Box
Product type and compatibility: Single 10-inch sealed box with a 0.88 cubic feet internal airspace. Behind-seat truck design at 7.5 inches deep, designed to fit behind a single-cab or extended-cab truck seat without intruding on cabin or cargo space. Built with 5/8-inch MDF construction for reduced resonance and vibration at higher volumes. Best for compact installs where space is at a premium.
Who it’s best for and why: Best for buyers needing a slim, behind-seat enclosure with solid bass from a single 10″ driver. Use this if you want a minimal footprint with reliable sealed bass. Limitation: 10″ driver configuration offers less total bass output than 12″ models in larger enclosures.
Q Power Quad 8in Underseat Front Fire Subwoofer Enclosure
Product type and compatibility: Underseat front-fire enclosure with four 8-inch openings in a single box. Designed for Chevy Silverado Crew Cab and GMC Sierra Crew Cab from 2007-2026. The design supports four 8″ subwoofers for a strong, immersive bass experience, with sound projection that emphasizes clarity and loudness behind the front seats.
Who it’s best for and why: Choose this if you want a multi-driver, high-output underseat option in GM trucks. Better for listeners who want more bass presence in the front half of the vehicle. Caution: installation may require precise alignment of four 8″ drivers and room behind the seat to avoid interference with seat tracks or wiring.
QPower Dual 10″ Sealed Heavy Duty Truck Sub Box Enclosure
Product type and compatibility: Dual 10-inch sealed enclosure with a 1″ MDF face and a 3.4″ MDF box frame. Built for heavy-duty use and designed for truck interiors where solid, compact bass is required. Best for moderate power builds in full-size trucks with limited space behind seats.
Who it’s best for and why: Good for buyers who want a durable, slim dual-driver sealed option in larger trucks. Choose this if you value sturdy construction and a compact footprint. Limitation: Sealed design typically offers less bass extension than ported enclosures at the same wattage.
QTw12 Single 12″ Sealed Sub Box (Pair)
Product type and compatibility: Set of two sealed 12-inch enclosures, each with a single cutout and 0.88 cubic feet internal airspace. Behind-seat truck design at 7.5 inches deep, compatible with single-cab or extended-cab trucks. Made from 5/8-inch MDF to minimize resonance and vibration at high volumes.
Who it’s best for and why: Best for buyers who want a pair of compact sealed enclosures that fit behind the seat with consistent bass in smaller cabs. Use this for balanced, clean bass in a budget-friendly, no-fuss package. Limitation: Two separate boxes may be harder to install in very tight spaces compared to a single, larger enclosure.
Buying Guide: How To Choose The Right Sub Box For Your Truck
What enclosure type fits your goals?
- Sealed vs. ported: Sealed enclosures deliver tight, precise bass that’s accurate at all listening levels. Ported enclosures provide louder bass output and deeper bass extension but require careful tuning to avoid port noise and space constraints.
- Under-seat vs. behind-seat: Under-seat boxes save cargo space and maintain a clean cabin, while behind-seat configurations maximize available internal airspace in some trucks.
- Driver count and size: More drivers (quad 8″ or dual 12″) deliver higher SPL but require more space and power. Larger drivers move more air, producing deeper bass in a smaller footprint—if the enclosure design supports it.
- Vehicle compatibility: Check cab configuration (single, extended, crew), seat mounting, and rear-seat clearance. Some enclosures specify compatibility with specific model years and body styles.
- Power handling: Align subwoofers’ wattage with your amplifier’s output. Higher wattage demands robust electrical and ventilation considerations inside the enclosure.
Practical installation tips: Ensure a tight seal between enclosure and mounting surface to prevent air leaks. Use factory mounting points when available and maintain room for electrical wiring, heat dissipation, and airflow. Consider adding damping material inside the cargo area to reduce cabin rattle if you experience vibrations at higher volumes.
Frequently Asked Questions
- What is the difference between sealed and ported sub boxes?
Sealed boxes deliver tight, accurate bass with less low-end extension, while ported boxes enhance bass output and deeper tones but require careful tuning and space planning.
- Which enclosure is best for a Dodge Ram under the rear seat?
A dual 12-inch sealed enclosure designed for under-seat installation is often ideal for Dodge Ram configurations, balancing space and bass control.
- Can I install a large sub box in a small truck?
Yes, but you may need a slim profile or under-seat design. Check measurements and confirm clearance behind seats and under floor mats.
- Do I need an amplifier with these sub boxes?
Most sub boxes are designed to be paired with an external amplifier. Ensure the amplifier power matches the subwoofers’ rating and enclosure design to avoid distortion.
- Are quad 8-inch enclosures louder than dual 12-inch enclosures?
Quad 8-inch enclosures can produce higher SPL in some cases due to more drivers, but the overall loudness depends on box tuning, driver quality, and vehicle acoustics.
- What should I consider before buying a small, shallow sealed box?
Consider internal airspace, mounting depth, and the driver’s efficiency. Shallow sealed boxes are compact but may have limited low-end extension compared to deeper boxes.