Bottom line: choose a truck bed sub box that fits your cab size, provides solid bass, and installs without major modifications. This guide highlights five subwoofer enclosures that deliver strong low-end performance while fitting common pickup truck configurations. Best for crew-cab pickups with rear-seat space and for drivers who want a plug-and-play upgrade. The listed products vary from under-seat to rear-seat compatible designs, so you can pick the enclosure that aligns with your truck model and preferred mounting location.
Who should consider these products: owners wanting a compact enclosure with simple installation, those upgrading from stock audio, and folks seeking louder bass without a full aftermarket trunk setup. For each item, we note the best use case, installation notes, and a clear trade-off to help you compare quickly.
Summary of chosen products
| Product | Best For | Installation Note | Limitations |
|---|---|---|---|
| QPower Dual 12″ Underseat Downfire Subwoofer Enclosure | Crew cab trucks needing compact rear-seat compatibility | Underseat downfire design with spring-loaded terminals | Not compatible with some double cab models |
| QPower Quad 8″ Underseat Front Fire Subwoofer Enclosure | Single-vehicle crew cab with 8″ woofer options | Underseat front-fire design for rear seating clearance | Limited to 8″ woofers |
| Rockville REC104 Dual 12″ Subwoofer Box (Ford F-Series) | Ford F-150 SuperCrew and larger crew cabs | Mounted under rear seats; vented for heat management | Specific to certain Ford models |
| Skar Audio Dual 12″ Loaded Ported Subwoofer Enclosure | Chevy Silverado / GMC Sierra Crew Cab | Dual 12″ VD-12 subs; under rear-seat mounting | Requires compatible Skar subs for max performance |
| Q Power 2 Hole 12 Inch Subwoofer Enclosure (Single Cab) | GM/ Chevy single-cab trucks needing slim profile | Shallow, slim design behind the seat | Single cab fit; limited to 12″ dual-wide layout |
Below are five top picks. Each entry includes a clickable link to the product, an image, and a concise rationale to help you decide quickly.
QPower Dual 12″ Underseat Downfire Subwoofer Enclosure
Best for crew cab trucks that need maximum rear-seat clearance with solid bass. This dual 12″ enclosure fits 12″ subs and uses an underseat downfire design for efficient space use. The 11-inch cutout diameter supports a wide subwoofer choice, enhancing low-end performance without intruding into cabin space. Caution: not compatible with some double cab models, so verify cab type before purchase.
QPower Quad 8in Underseat Front Fire Subwoofer Enclosure
Best for crew cab trucks that want high impact with four 8″ woofers. The quad-hole openings enable multiple woofer configurations, improving bass projection. It’s designed for underseat placement with front-fire orientation to push sound toward the cabin. Choose this if you want a louder per-seat bass impression, but ensure your truck has room for four 8″ drivers.
Rockville REC104 Dual 12″ Subwoofer Box
Best for Ford F-150 SuperCrew and similar crew cab trucks needing an under-seat, rear-angled enclosure. This vented design helps with heat management and produces deeper bass without sacrificing headroom. It’s a solid choice for owners seeking a balanced, loud, yet controlled bass response under the rear seats. Limitation: model compatibility varies by truck year and configuration.
Skar Audio Dual 12″ Loaded Ported Subwoofer Enclosure
Best for 2019-2026 Chevy Silverado / GMC Sierra Crew Cab. This dual 12″ loaded enclosure uses a ported design to maximize bass output under the rear seat. It ships with two Skar VD-12 D4 12″ subwoofers, delivering robust low-end performance. Choose this if you want a ready-to-install, high-output setup that fits specific GM crew-cab configurations. Caution: requires matching subwoofers for full performance.
Q Power 2 Hole 12 Inch Subwoofer Enclosure (Single Cab)
Best for GM and Chevy single-cab trucks needing a slim, rear-seat-friendly box. The shallow, slim design behind the seat preserves cabin space while delivering solid bass from dual 12″ woofers. It’s a good pick when trunk or rear-seat space is at a premium. Limitation: single-cab fit only, so not suitable for crew cab trucks.
Buying Guide
What should you consider before buying a truck bed/sub enclosure?
Fitment: Check your cab type (single cab, crew cab) and the available height under the seat or behind the seat. Measure depth and width, and confirm an 8″ or 12″ cutout if you plan to use 8″ or 12″ woofers. Power handling should align with your head unit and amplifier capacity.
Enclosure type and bass response
Underseat enclosures with downfire or front-fire orientations generally maximize space while delivering tight bass. Ported designs tend to produce louder bass at lower frequencies; sealed enclosures emphasize tighter, more controlled bass. Your listening style (rap, rock, EDM) will influence the right balance.
Material quality and durability
Look for MDF or high-density composite with a robust finish. A bed liner or rugged coating adds durability in harsh truck environments. A vented design helps heat manage subs when they work harder for extended periods.
Installation considerations
Spring-loaded terminals simplify wiring. Confirm that the enclosure does not obstruct seating, bed access, or cargo space. Some models require removing or repositioning a seat or trim pieces for a clean install.
Warranty and compatibility notes
Product compatibility can vary by year, cab type, and bed dimensions. If a model specifies a particular truck lineup, double-check it against your vehicle’s configuration. Warranty terms are not listed here; verify with the seller if warranty coverage matters for you.
FAQ
- What enclosure is best for a crew cab pickup? An underseat or rear-seat enclosure that fits behind the seat and uses a vented or downfire design typically provides strong bass without sacrificing interior space.
- Can I install a dual 12″ box behind the rear seats? Yes, many dual 12″ enclosures are designed to fit under rear seats in crew cab trucks, but always verify fitment for your specific year and model.
- Should I choose a ported or sealed enclosure? Ported enclosures usually offer louder bass and deeper extension, while sealed enclosures provide tighter, more accurate bass. Your listening preference matters most.
- Do these boxes come with speakers? Some listings include loaded enclosures with pre-installed subs; others are empty enclosures intended for your own subwoofers. Check each product’s specifics before buying.
- Are these easy to install for a non-professional? Many are designed for straightforward installation with basic tools, but deeper installs may require electrical work and trim removal. Review installation guides or tutorials for your chosen model.