12-inch Round Single Bass-Reflex Subwoofer Box - 40 L / 35 Hz - 726 × 417 × 285 mm

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. Built from 16 mm (5/8 inch) material in a simple rectangle shape, the cabinet measures 726 × 417 × 285 mm (28.54 × 16.43 × 11.24 in). A double-thickness front baffle increases rigidity and reduces flex, making the box suitable for high-output systems. The port area is optimized for large-excursion drivers and SPL use with high airflow demand. This design serves as a general-purpose home enclosure for music and stereo systems, balancing bass extension and size, while also being ideal for everyday car-audio use where trunk space and balanced sound are key.