Universal box template

Single 12-inch Vented / Bass-Reflex Subwoofer Box - 40 L / 35 Hz

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Description

This vented (bass-reflex) enclosure is designed for a single 12-inch round subwoofer, featuring a 40 L chamber tuned to 35 Hz with one L-shaped slot port. The cabinet is constructed in a simple rectangle shape using 16 mm (5/8 inch) material, with external dimensions of 615 × 391 × 352 mm (24.2 × 15.41 × 13.87 in). A double-thickness front baffle and one internal brace enhance rigidity and minimize panel vibration, making it suitable for high-output systems. The port area is optimized for high-airflow demand and large-excursion drivers in SPL-oriented applications. Designed for everyday car-audio use, it accounts for limited trunk space and installation constraints while serving as a general-purpose home subwoofer enclosure that balances bass extension, size, and low distortion for stereo systems.

Volume & tuning

40 l
Internal volume
35 Hz
Tuning frequency

Box properties

Shape
Simple Rectangle
Material thickness (mm)
16
Material thickness (inch)
5/8
Box dimensions (mm)
616 × 391 × 352
Box dimensions (inch)
24.2 × 15.41 × 13.87
Max RMS speaker power up to
5000 W
Speaker mounting panel layers
Double
Number of bands
1

Enclosure & speaker

Enclosure
Vented
Speaker configuration
Single
Number of speakers
1
Speaker size
12"

Port

Port type
Rectangular
Port count
1
Port area (sq.mm)
18241
Appearances
View all
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