2007–2018 GM Crew Cab – Dual 10" Under‑Seat Ported Subwoofer Box Plans
Subwoofer Box Plans for (2) 10" Subwoofers – Under‑Seat Ported Enclosure
Build a powerful, space‑efficient under‑seat ported enclosure for two 10" subwoofers with these precision‑engineered box plans. Designed specifically for 2007–2018 GM/Chevy/GMC Crew Cab trucks, this enclosure maximizes airspace, output, and cabin gain while maintaining full rear‑seat functionality.
Perfect for truck owners who want strong, clean bass without sacrificing interior space.
Save Money — Build It Yourself
Stop wasting materials and guessing on dimensions. These DIY subwoofer box plans make it simple to build a professional‑grade enclosure at home, giving you premium performance without paying custom‑shop prices.
What’s Included
- Downloadable ZIP file
- Multiple 3D rendering images
- Detailed spec sheet with subwoofer & enclosure specs
- Professional optimized cut sheet with parts list
- Precision‑designed under‑seat ported enclosure layout
Designed For
2007–2018 GM Crew Cab Trucks – Dual 10" Ported Enclosure
- Woofer Capacity: (2) 10" subwoofers
- Fitment: 2007–2018 Chevy Silverado / GMC Sierra Crew Cab
- Seat Lift Required: 2.5"
- Outside Dimensions:
- Width: 55"
- Front Height: 11"
- Rear Height: 8"
- Depth: 16"
- Center Hump: 15" wide × 1.5" tall
- Tuning: Manufacturer‑optimized ported design
- Performance Notes: Engineered for strong low‑frequency output, excellent cabin gain, and efficient airflow in limited under‑seat space
May work for other 10" woofers and other truck models — user discretion advised.
Important Fitment Notice
Some modification to the top panel may or will be required depending on the woofer’s basket depth, magnet size, or motor structure.
This is normal for high‑performance 10" subs in under‑seat applications.
Why These Plans Perform
- Optimized specifically for the 2007–2018 GM Crew Cab under‑seat area
- Dual‑woofer layout maximizes output while preserving seat usability
- Smooth, predictable response thanks to proper airspace and port tuning
- Maintains full rear‑seat functionality with only a 2.5" lift
- Ideal for daily setups needing clean, punchy, and powerful bass
- Eliminates trial‑and‑error and prevents wasted materials