Single 12-inch Vented / Bass-Reflex Subwoofer Box - 40 L / 33 Hz

This vented (bass-reflex) enclosure is designed for a single 12-inch round subwoofer, featuring a 40 L chamber tuned to 33 Hz. Constructed from 16 mm (5/8 inch) material in a simple rectangle shape, the cabinet has external dimensions of 593 × 399 × 359 mm (23.31 × 15.72 × 14.15 in). One internal brace reinforces the cabinet and reduces panel vibration, making it ideal for high-output subwoofer systems. The design uses 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 that balances bass extension, size, and low distortion, while also being optimized for everyday car-audio use where trunk space and installation constraints require a balanced sound.