Universal box template

Dual 12-inch round Vented / Bass-Reflex subwoofer box

Description

This Vented / Bass-Reflex enclosure is designed for 2-driver 12-inch round subwoofer units, utilizing a 60 L chamber tuned to 35 Hz. Built from 18 mm (3/4 inch) material in a simple rectangle shape, the cabinet features external dimensions of 856 × 363 × 363 mm (34.32 × 14.34 × 14.34 in). A double-thickness front baffle increases rigidity and reduces flex, making the box ideal for high-output systems. The design incorporates one L-shaped slot port with a port area suitable for high-output, large-excursion drivers and SPL-oriented use with high airflow demand. It serves as a general-purpose home subwoofer enclosure for music and stereo systems, balancing bass extension, size, output, and low distortion. Additionally, it is optimized for everyday car-audio use, accounting for limited trunk space, installation constraints, and balanced sound.

Volume & tuning

60 l
Internal volume
35 Hz
Tuning frequency

Box properties

Shape
Simple Rectangle
Material thickness (mm)
18
Material thickness (inch)
3/4
Box dimensions (mm)
856 × 364 × 364
Box dimensions (inch)
34.32 × 14.34 × 14.34
Max RMS speaker power up to
250 W
Speaker mounting panel layers
Double
Number of bands
1

Enclosure & speaker

Enclosure
Vented
Speaker configuration
Multi
Number of speakers
2
Speaker size
12"

Port

Port type
Rectangular
Port count
1
Port area (sq.mm)
23349
Appearances
View all
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