Custom DIY 6th Order Bandpass Subwoofer Box Plans

Wait Time: Please allow up to 5-7 business days to get your plans sent VIA Email
 
Introducing our Custom DIY 6th Order Bandpass Subwoofer Box Plans, designed to take your sound system to the next level. The subwoofer box is the key component in ensuring that your system delivers powerful and clear bass. With our custom plans, you can tackle your DIY project with confidence, knowing that the design is tailored specifically for your application.
 
NEW AND IMPROVED PLANS! Including:
A TON of Detailed  3-d Rendering Images
Multiple outside angles
Multiple inside angles
Detailed Parts views of every part showing measurements and angles
Step BY Step Assembly Instructions with images
Pre Drill/Screw instructions with images
Specifications/ Info Sheet
Optimized Cut Sheet and Parts List
 
Skill Level
Skill level is based on your woodworking ability mixed with the tools available to you.
Novice/First Timer 
 -Very limited woodworking experience and only access to very basic tools like a jig saw or circular saw. We will Tailor your plans to be as simple as possible
Weekend Warrior
-Youve done some woodworking projects and have access to wood working tools like a circular saw/table saw and router which you feel confident in using. We will tailor your plans based on your skill/tool level.
Semi-Pro
-You do some form of woodworking for a living or your an advanced level hobbyist. You have a router table, table saw, and access to more advanced wood working tools like clamps, different router bits and are confident you can build almost anything with instruction. By Selecting this, your looking for something with detailed features using more advanced methods. 
 
🛠️ Recommended Tools & Supplies for Building Your Own Subwoofer Box
📐 Cutting Parts from Your Cut List
Before assembly begins, precision cuts are key. Depending on your setup and budget, you’ll need one or more of the following:
Tape Measure – For accurate measurements.
Straight Edge – Ensures clean, straight cuts.
Square – Critical for maintaining perfect 90° angles.
Circular Saw, Jig Saw, or Table Saw – Choose based on your workspace and comfort level.
Safety Glasses – Protect your eyes from flying debris.
Dust Mask – Keep your lungs safe from sawdust.
🔊 Cutting Subwoofer Mounting Holes
Clean, accurate cutouts for your subwoofer are crucial for both fit and performance:
Jig Saw – A flexible option for manual cutouts.
Router with ¼" Spiral Straight Cut Bit and Circle Jig – Ideal for perfect circles and smooth edges.
🌀 Creating Round Overs
Round overs help reduce edge diffraction and give your box a pro finish:
Sandpaper and Sanding Block or Power Sander – Great for manual smoothing.
Router with ⅜" Round Over Bit – For consistent, clean edge profiles.
🪟 Window Braces, Plexiglass Cutouts & Stack Fab Parts
For more advanced builds with visual elements or layered construction:
Jig Saw or Router with Templates/Straight Edge – For custom shapes and precision.
Router Table – Highly recommended for stack fab parts to ensure uniformity and clean edges.
🔧 Assembly Essentials
Putting it all together requires a mix of adhesives, fasteners, and alignment tools:
Wood Glue (TiteBond 2 recommended) – Strong, reliable bond.
Clamps – Optional but extremely helpful for holding parts during drying.
1¼" Coarse Thread Wood Screws – Drywall screws work great.
Brad Nail Gun (18G Nails, 1¼") – Optional, but excellent for temporary hold while glue sets.
Pencil & Square – For marking and alignment.
Drill/Impact Driver with Philips Head Bit – Or a screwdriver if you're keeping it old school.
⅛" Drill Bit & ⅜" Countersink Bit – If you're using screws, these are a must.
🧪 Fiberglass-Specific Supplies (For Advanced Builds)
If your box design includes fiberglass elements, here’s what you’ll need:
Tape – For masking and layout.
Multiple 2" Chip Brushes – Disposable and perfect for resin application.
Fiberglass Resin (1qt usually sufficient) – Choose quality resin for durability.
Fiberglass Mat (1 yard is plenty) – Adds strength and structure.
Gloves – Protect your hands from resin and chemicals.
Mixing Cups – For accurate resin/hardener ratios.
Acetone – Essential for cleanup.
🧱 Surface Prep & Finishing
To get that smooth, professional finish:
30–80 Grit Sandpaper – For rough patches and heavy imperfections.
Bondo/Body Filler (1 GAL recommended) – Better to have extra than run out mid-project.
80–150 Grit Sandpaper & Block or Sander – Block sanding gives the best results.