Universal box template
Single 8-inch Vented / Bass-Reflex Subwoofer Box - 20 L / 38 Hz
Description
This 20 L Vented / Bass-Reflex enclosure is designed for a single 8-inch subwoofer, featuring a chamber tuned to 38 Hz. Constructed from 16 mm (5/8 inch) material in a simple rectangle shape, the external dimensions are 510 × 281 × 234 mm (20.04 × 11.1 × 9.24 in). It serves as a general-purpose home subwoofer enclosure for music and stereo systems, balancing bass extension, cabinet size, output, and low distortion. Additionally, it is optimized for everyday car-audio use, accounting for limited trunk space, installation constraints, and balanced sound. The design incorporates one L-shaped slot port with an area suitable for high-output drivers with increased cone excursion and airflow demand.
Volume & tuning
20 l
Internal volume
38 Hz
Tuning frequency
Box properties
Shape
Simple Rectangle
Material thickness (mm)
16
Material thickness (inch)
5/8
Box dimensions (mm)
510 × 282 × 235
Box dimensions (inch)
20.04 × 11.1 × 9.24
Max RMS speaker power up to
1200 W
Speaker mounting panel layers
Single
Number of bands
1
Enclosure & speaker
Enclosure
Vented
Speaker configuration
Single
Number of speakers
1
Speaker size
8" Rectangle
Port
Port type
Rectangular
Port count
1
Port area (sq.mm)
5189
