Dual Sundown Audio X Series 15" 4th Order Blow‑Thru Subwoofer Box Plans
Subwoofer Box Plans for (2) Sundown Audio X Series 15" – 4th Order Blow‑Thru Enclosure
Build a brutally powerful, deep‑hitting 4th order blow‑thru enclosure for two Sundown Audio X Series 15" subwoofers with these precision‑engineered subwoofer box plans. Designed for extreme output, massive low‑end authority, and wide‑bandwidth performance, this enclosure unleashes the full potential of Sundown’s X Series — known for its monstrous motor force and high‑power handling.
Perfect for truck blow‑thru builds where maximum cabin pressure and low‑frequency extension are the priority.
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 competition‑level 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 4th order blow‑thru layout
Designed For
Dual Sundown Audio X Series 15" Subwoofers – 4th Order Blow‑Thru Enclosure
- Woofer Type: (2) Sundown Audio X Series 15
- Woofer Size: 15"
- Outside Dimensions: 49"W × 20"H × 35"D
- Tuning: 4th order bandpass (sealed + ported chambers engineered to manufacturer specs)
- Performance Notes: Built for extreme output, deep low‑frequency punch, and wide‑bandwidth response — ideal for truck blow‑thru applications
May work for other 15" woofers — user discretion advised.
Why These Plans Perform
- Optimized specifically for dual Sundown X Series 15" subs
- 4th order blow‑thru design delivers extreme cabin pressure and massive low‑end authority
- Wide bandwidth response for loud, clean, musical performance
- Engineered for high‑power daily setups and demo‑style builds
- Smooth, predictable response thanks to properly balanced sealed and ported chambers
- Eliminates trial‑and‑error and prevents wasted materials