2009–2025 Ford F150 Crew Cab – Quad Concrete Audio C5 8" Subwoofer Box Plans
Subwoofer Box Plans for (4) Concrete Audio C5 8" – Ported Truck Enclosure
Build a tight, punchy, and hard‑hitting quad‑8 ported enclosure for the Concrete Audio C5 8" subwoofers with these precision‑engineered subwoofer box plans designed specifically for the 2009–2025 Ford F150 Crew Cab. This enclosure maximizes under‑seat airspace, airflow efficiency, and output while maintaining full rear‑seat usability.
The C5 8 is known for its impressive motor strength, fast transient response, and surprising low‑end authority for an 8‑inch driver. This enclosure provides the ideal airspace, port area, and tuning frequency needed to deliver clean, musical, and powerful bass inside the F150 cabin.
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 — perfect for anyone wanting clean, high‑quality bass 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 ported truck enclosure layout
Designed For
Quad Concrete Audio C5 8" Subwoofers – 2009–2025 Ford F150 Crew Cab
- Woofer Type: Concrete Audio C5 8
- Woofer Size: 8"
- Configuration: Quad‑8 ported enclosure
- Outside Dimensions: FH12” x RH9” x W54” x D15”
- Seat Lift Required: 3.5"
- Tuning: 34Hz
- Performance Notes: Engineered for fast, accurate bass with strong mid‑bass punch and impressive low‑end extension for a quad‑8 setup
May work for other 8" woofers — user discretion advised.
Why These Plans Perform
- Optimized specifically for the Concrete Audio C5 8"
- Designed to fit 2009–2025 Ford F150 Crew Cab with proper seat lift
- Ported layout maximizes airflow and reduces turbulence
- Smooth, predictable response thanks to proper port tuning
- Ideal for daily setups needing tight, musical, and powerful bass
- Eliminates trial‑and‑error and prevents wasted materials