Subwoofer Box Plans for (2) Sundown Audio Xv3 15s – 4th Order Blow‑Through Enclosure
Build a powerful, high‑output 4th order blow‑thru box for your Sundown Audio Xv3 15s with these precision‑designed subwoofer box plans. Whether you're building a blow‑through truck setup or a serious SPL system, these plans give you the accuracy, tuning, and performance needed for deep lows, clean output, and extreme cabin pressure.
See Real‑World Performance:
Check out a customer build using this exact design:
https://www.customlows.com/post/customer-submission-loud-and-clean-sundown-audio-xv3-15s-blow-thru
Save Money — Build It Yourself
Skip the guesswork and wasted materials. These DIY subwoofer box plans make it easy to build a professional‑grade enclosure at home. Perfect for anyone wanting maximum bass without paying custom‑shop prices.
What’s Included
- Downloadable ZIP file
- Multiple 3D rendering images
- Detailed spec sheet with subwoofer & enclosure specs
- Professional cut sheet with parts list
- Precision‑designed 4th order blow‑through layout
Designed For
(2) Sundown Audio Xv3 15s — 4th Order Blow‑Thru
- Outside Dimensions: 20”H × 48”W × 36”D
- Tuning: 54Hz
- Net Volume After Displacement: 4.17 / 9.18 cu ft
- Based on manufacturer‑recommended specs
May work for other 15" woofers — user discretion advised.
Why These Plans Perform
- Optimized for Sundown Xv3 15s
- Designed for strong low‑end extension and clean upper‑bass response
- Ideal for blow‑through truck builds
- Smooth, predictable response thanks to proper 4th order design
- Eliminates trial‑and‑error and wasted materials