What is a Flat Pack Subwoofer Box?

Flat-Pack and DIY Truck Subwoofer Box Kits

The DIY Revolution: Flat-Pack Kits

For the hands-on enthusiast, CustomLowZ’s flat-pack subwoofer box kits offer the perfect blend of professional design and DIY satisfaction. Each kit includes:

• Pre-cut, sanded, and pre-drilled panels (optional)

• Assembly instructions and renderings

• All necessary hardware (optional)

• Custom fitment for your truck and subwoofer

Assembly can be completed with basic tools—often just a screwdriver, wood glue, and a drill—making these kits accessible even to those with limited woodworking experience.

Benefits of Flat-Pack Kits

• Cost savings: DIY assembly reduces labor costs

• Customization: Choose your sub size, port style, finish, and more

• Professional results: Precision CNC cutting ensures perfect fit and alignment

• Quick turnaround: Kits typically ship within 1–3 weeks

“Bought a couple of plans for underseat boxes for my Silverado. The plans are well laid out and a cut sheet was included which is convenient. If I have any more needs for box design I won't hesitate to come back.”— James

“I purchased the sundown zv5 duel 15 plan and I can say it's the best subwoofer box I've owned. It was my first time building my own box and it came out perfect. The plans was super easy to understand and straight forward. 10 out 0f 10 I do recommend..”— Marc

Flat-pack kits are a game-changer for DIYers who want professional-grade results without the hassle of full custom fabrication.