Custom-Fit Subwoofer Boxes for Your 2007-2013 Silverado and Sierra
Rigs like the 2007-2013 Chevy Silverado and Sierra Crew Cab are built for hard work, long road trips, and daily commuting.
But when it comes to their audio setup, it can be quite the fixer-upper. Upgrading the audio in a crew cab truck presents a unique challenge. You want bone-rattling bass, but you can’t sacrifice your passenger legroom or under-seat storage.
That is exactly where custom-fit subwoofer enclosures come to the rescue. By utilizing the unused space directly underneath the rear seat, you can add massive bass output without cluttering your cabin.
Your Next Upgrades at a Glance
This buyer's guide breaks down the best under-seat options from NVX, whether you’re looking to install your own subwoofers into an empty enclosure or hoping to pick up a ready-to-play loaded system.
- Best for DIY Custom 10-Inch Builds: NVX VE-GM-SLVCCG2-D10S Custom Fit Dual 10" Empty Sealed Down-Firing Enclosure
- Best for DIY Maximum Surface-Area Builds: NVX VE-GM-SLVCCG2-D12S Custom Fit Dual 12" Empty Sealed Down-Firing Enclosure
- Best Turnkey System for Tight, Punchy Bass: NVX LVE-GM-SLVCCG2-D10S Custom Fit 700W RMS Dual 10" Loaded Subwoofer Enclosure
- Best Overall Turnkey Heavy-Hitter: NVX LVE-GM-SLVCCG2-D12S Custom Fit 800W RMS Dual 12" Loaded Subwoofer Enclosure
Why NVX Custom-Fit Enclosures Make the Perfect Fit
Clearance is everything for trucks like the Silverado and Sierra. A universal subwoofer box simply won’t slide seamlessly under those rear seats without sticking out or requiring unsafe aftermarket seat-lift kits.
NVX engineered these specific dual 10-inch and dual 12-inch enclosures using advanced CNC technology to match the exact contours of the GM crew cab floor pans.
They also feature a down-firing design, naturally protecting your speaker cones from kicking feet, dropped tools, and shifting cargo.
Let’s dive into the technical specifics of these premium enclosures so you can choose the exact setup that fits your listening preferences and budget.
Building Your Own Bass System with NVX
NVX offers two stellar empty enclosures, both meticulously hand-assembled and constructed from highly durable 3/4-inch Medium Density Fiberboard (MDF) to prevent panel flexing and eliminate sound-killing resonance.
What’s more is that they’re finished in a premium black carpet that blends into your factory interior without fail.
NVX VE-GM-SLVCCG2-D10S Custom Fit Dual 10" Empty Sealed Down-Firing Enclosure
This empty enclosure is perfectly tailored for a pair of 10-inch shallow or mid-depth subwoofers.
- Box Volume: 1.0 cubic foot per chamber (2.0 cubic feet total)
- Maximum Mounting Depth: 5.5 inches
- Subwoofer Cutout Diameter: 9-3/16 inches
- Enclosure Type: Sealed, down-firing
NVX VE-GM-SLVCCG2-D12S Custom Fit Dual 12" Empty Sealed Down-Firing Enclosure
If you prefer the deeper, more resonant bass characteristics of 12-inch drivers, this is your solution. It offers the same premium build quality and internal volume but is cut specifically to accommodate 12-inch subwoofers.
- Box Volume: 1.0 cubic foot per chamber (2.0 cubic feet total)
- Maximum Mounting Depth: 5.5 inches
- Subwoofer Cutout Diameter: 11-1/8 inches
- Enclosure Type: Sealed, down-firing
The Plug-and-Play Powerhouses: Pre-Loaded for Maximum Performance
Do you want to skip the guesswork of matching subwoofer specs and calculating box volumes? We’ve got you covered with our fully loaded enclosure packages.
These units feature the same custom-fit 3/4-inch MDF boxes mentioned above, but they arrive fully loaded with powerful NVX S-Series subwoofers that are internally wired to a 1-ohm final impedance.
All you need to do is connect your speaker wire and tune your amplifier, and you’re all set!
NVX LVE-GM-SLVCCG2-D10S Custom Fit 700W RMS Dual 10" Loaded Subwoofer Enclosure
This dual 10-inch loaded package delivers tight, punchy bass that responds quickly to double-kick drum pedals and rapid basslines. It comes equipped with two high-performance NVX SMW10D4 subwoofers.
- Power Handling: 700 watts RMS total (350 watts RMS per sub) / 1400 watts Peak
- Final Impedance: 1-ohm
- Subwoofer Features: Carbon Fiber Reinforced Polypropylene cone, Butyl Rubber surround, and a massive 50 oz Y30 high-energy Ferrite magnet.
- Frequency Response: 25–350 Hz
NVX LVE-GM-SLVCCG2-D12S Custom Fit 800W RMS Dual 12" Loaded Subwoofer Enclosure
For those who want to feel every low-frequency drop in hip-hop, EDM, or modern rock, this dual 12-inch setup significantly steps up the surface area and power. It comes loaded with two heavy-hitting NVX SMW12D4 subwoofers.
- Power Handling: 800 watts RMS total (400 watts RMS per sub) / 1600 watts Peak
- Final Impedance: 1-ohm
- Subwoofer Features: Carbon Fiber Reinforced Polypropylene cone, Butyl Rubber surround, and an upgraded 53 oz Y30 high-energy Ferrite magnet.
- Frequency Response: 25 – 350 Hz
Perfect Pairings: Complete Your Setup
No subwoofer enclosure operates in a vacuum. To get the absolute most out of your newly loaded subwoofers, you’ll need clean power and a solid installation.
Here are a few recommended pairings to complete your truck’s audio transformation:
- Monoblock Amplifiers: Since both loaded enclosures are wired to a 1-ohm final load and require between 700 and 800 watts RMS, you’ll want an amplifier that perfectly matches this power output.
Look into the NVX VAD10001 or the NVX NDA103 monoblock amplifiers. Both will provide highly efficient Class-D power to push your setup without dangerously overheating.
- Amp Wiring Kits: Ensure your amplifier gets the electrical current it needs with an NVX true-spec 4-gauge OFC (Oxygen-Free Copper) wiring kit. Never settle for cheap CCA (Copper-Clad Aluminum) wire when powering high-wattage systems.
- Sound Deadening: A dual 10-inch or dual 12-inch system pushes a massive amount of air inside a truck cabin. Apply NVX sound deadening material to your truck’s rear wall and floorboard to prevent annoying sheet metal rattles and keep the exhaust noise out.
Frequently Asked Questions (FAQs)
Do I need a seat lift kit to install these subwoofer boxes?
Not at all. The true beauty of these custom-fit enclosures is that they slide directly under your factory rear seats without requiring any dangerous or costly modifications to the factory seat brackets.
What kind of amplifier do I need for the loaded enclosures?
Both the dual 10-inch and dual 12-inch loaded enclosures feature a final wiring impedance of 1 ohm. You’ll need a stable 1-ohm monoblock amplifier capable of outputting 700 watts RMS (for the 10-inch box) or 800 watts RMS (for the 12-inch box).
Why is a down-firing enclosure better for a truck?
A down-firing design faces the subwoofers directly toward the floorpan. This maximizes bass output by using the floor to load the bass waves, while also keeping the delicate speaker cones completely protected from passengers' feet, pet claws, and heavy cargo.
The NVX Advantage
When you upgrade your car audio, you deserve components that are engineered with passion, honesty, and an uncompromising commitment to quality, and that’s exactly what you get when you choose NVX.
Unlike run-of-the-mill brands that rely on inflated peak wattage numbers and cheap materials to make a quick sale, NVX utilizes real-world RMS power ratings, true-spec OFC wiring, and premium 3/4-inch MDF in all their custom enclosures.
You’re guaranteed audiophile-grade sound quality, aggressive performance, and exceptional customer service–all at a highly competitive price point. Equip your truck with NVX, and experience car audio the way it was truly meant to be heard.