Enclosure Specs
Internal Dimensions & Clearances
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Total Air Volume
2.3 ft³ Sealed total air space.
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Mounting Depth
6 inches.
Note: Actual depth may vary based on subwoofer magnet size.
Note: Actual depth may vary based on subwoofer magnet size.
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Woofer Clearance
2.25 inches from the bottom of the enclosure to the floor.
Stage 2 • Most Popular
Clean OEM-Plus Enclosure for GM Trucks with Acrylic + Addressable Lighting
Stage 2 is our most popular option because it’s the perfect balance: super clean OEM-plus fitment with just the right amount of visual flex.
You get an integrated acrylic panel on the front (with an optional side acrylic add-on), plus addressable LED lighting that can be set to any color. No see-through windows — just a clean, premium look that looks factory until it lights up at night.
Fitment
Built Specifically for GM Trucks
- Fits all GM full-size trucks 2019–2026 (crew cab under-seat fitment).
- 3D-modeled for precise under-seat fitment (OEM-plus install).
- Rear seat functionality remains completely factory.
- Designed to look intentional — not like a generic prefab box shoved under the seat.
What’s Included
What Comes with Stage 2
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Custom Under-Seat Enclosure
Built in-house using CNC-cut panels and our proven GM under-seat design.
Designed for real output, reliability, and daily use.
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Standard Black Vinyl Finish
Stage 2 comes standard in clean black vinyl for a premium OEM-plus look.
You can upgrade to color-matched vinyl to match your interior.
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Front Integrated Acrylic Panel
Built-in front acrylic detail for a clean, high-end look without full viewing windows.
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Optional Side Acrylic Add-On
Want more visual? Add the side acrylic panels for a more custom, finished look under the seat.
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Addressable LED Lighting (Any Color)
Integrated addressable LEDs on the acrylic panels — set it to any color and make it match your truck.
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Plug-and-Play Terminal Cup
Includes our custom 3D-printed CB Customs terminal cup so wiring is clean, reliable,
and easy to connect.
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Optional Loaded Configuration
Sold unloaded by default. You can choose to add subwoofers and receive it
fully loaded and ready to drop in.
Performance
What to Expect
Stage 2 is made for customers who want clean, controlled bass and a premium look without going full window-style. It’s the “set it and forget it” option that looks factory-clean in the daytime, then glows at night.
Final impedance and power handling depend on your subwoofer choice (especially if you select a loaded option). If you want a matched amp recommendation, tell us what subs you’re running and we’ll point you to the right setup.
Built by CB Customs
Craftsmanship, Lead Time & Warranty
- Hand-built in Weatherford, Texas — cut, assembled, finished, and inspected in-house.
- Built to order — lead time is confirmed after purchase.
- Lifetime craftsmanship warranty on the enclosure.
- Real support — help before and after purchase if you have questions.
Questions?
Still not sure which stage or setup to go with?
Shoot us a text or call at (682) 516-3358, email sales@cbcustoms.net, or reach out below with your truck year and goals.