2017–2025 Ford F250–F350 Crew 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 high‑output ported enclosure for four Concrete Audio C5 8" subwoofers with these precision‑engineered subwoofer box plans designed specifically for the 2017–2025 Ford F250 & F350 Super Duty Crew Cab. This enclosure maximizes every cubic inch of under‑seat airspace while maintaining full rear‑seat usability.
The Concrete Audio C5 8 is known for its impressive output, clean mid‑bass, and surprising low‑end capability for an 8" driver. This enclosure provides the ideal airspace, port area, and tuning frequency needed to deliver tight, musical, and powerful bass inside the Super Duty cabin — perfect for daily listening with serious punch.
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 – 2017–2025 Ford F250/F350 Crew Cab
- Woofer Type: (4) Concrete Audio C5 8
- Woofer Size: 8"
- Outside Dimensions: Add your final dimensions — I can standardize them if you want
- Requires 3.5" Seat Lift
- Tuning: 34Hz truck‑optimized ported design
- Performance Notes: Engineered for tight, accurate bass with strong mid‑bass punch and excellent in‑cabin efficiency
May work for other 8" woofers — user discretion advised.
Why These Plans Perform
- Optimized specifically for four Concrete Audio C5 8s
- Designed to fit 2017–2025 Ford F250/F350 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 clean, musical, and punchy bass with high output
- Eliminates trial‑and‑error and prevents wasted materials