Single 8-inch Vented / Bass-Reflex Subwoofer Box - 20 L / 38 Hz

This vented (bass-reflex) enclosure is specifically designed for a single 8-inch round subwoofer, featuring a 20 L chamber professionally tuned to 38 Hz. Constructed from 16 mm (5/8 inch) material in a simple rectangle shape, the cabinet measures 548 × 285 × 256 mm (21.54 × 11.23 × 10.11 in). It includes one internal brace that reinforces the panels against vibration, making it ideal for high-output systems. The design utilizes one L-shaped slot port with an area optimized for large-excursion drivers and high-airflow SPL demands. Whether used as a general-purpose home subwoofer for music or for everyday car audio where trunk space is limited, this box balances bass extension, compact size, and low distortion.