The Best Dimensions for a 4 12 Inch Subwoofer Box Based On Box Type. When selecting the ideal dimensions for a 4- 12-inch subwoofer box, many factors come into play; these could include what kind of music is played through it, available space in your car, and the power handling capabilities of subwoofers. Here are some suggested dimensions: The easiest way of installing a 10 inch sub in a 12 inch subwoofer box is by using a 12 to 10 sub adapter. The idea behind the adapter is to allow you to install your 10 inch subwoofer in the hole size for 12 inch speaker effortlessly. Generally, most adapters are made up of 3/4″ MDF wood, a design that helps you to extend the mounting depth Step 4. Assemble the top, bottom and end pieces together to form a hollow square, with the top and bottom pieces overlapping the 3/4-inch sides of the end pieces. Connect the pieces together with 1-1/2-inch wood screws, spaced 2 inches apart. We learned, way back then, that a square of a given size will always have more area than that of a circle of the same dimension - exactly 27.33 percent more, regardless of the relative dimension. 12-9/16, 32: Mounting Depth [in, cm] 7-7/8, 20: Mounting Cutout [in, cm] 11-1/16, 28.1 Subwoofer / Speaker FAQ Box Building Help Wiring The SK1X8V is the perfect choice when looking for a single 8-inch subwoofer enclosure to pair with your subwoofer. Featuring a kerf style port, competition grade build quality, 1.25 cubic ft of air space, and tuned at 39 Hz, this box will allow your subwoofer to come alive. The dual 12-inch vented subwoofer box design provides you with the blueprints to build your own vented subwoofer box. This dual 12-in sub-box design has a volume of 3.00 ft. Build your own car subwoofer box using CT Sounds dual 12-inch vented subwoofer box design; 12-in dual sub-box design blueprint; dual 12" vented box for subwoofers. The P3D2-12 is Rockford Fosgate's best performing Punch series subwoofer for cars and trucks. The P3 12 inch subwoofers now feature anodized aluminum cones and dustcaps along with unique spider venting to keep the motor cooler than previous versions. Size. 12" Nominal Impedance. Dual 2-Ohm. Mounting Depth The box is built exactly to the Double Wall Shipping Box. Good for up to 3000w Rated Power (Any higher power than this and we highly recommend you get one of our custom hand built heavy duty enclosures) Designed by Bassahaulic Productions. Down4sound Profab 2-12 SUBWOOFER BOX DIMENSIONS: L x W x H: 32.5 x 20 x 16. Recommended subwoofers for example are any more budget type of CoiMd.