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

This 40 L Vented / Bass-Reflex enclosure is designed for a single 12-inch rectangular subwoofer and is tuned to 33 Hz. Constructed from 18 mm (3/4 inch) material in a simple rectangle shape, it features external dimensions of 610 × 401 × 360 mm (24.39 × 15.82 × 14.24 in). The design utilizes one L-shaped slot port with a port area suitable for high-output, large-excursion drivers and SPL-oriented use with high airflow demand. One internal brace reinforces the cabinet and reduces panel vibration, making it ideal for high-output systems. It serves as a general-purpose home subwoofer enclosure for music and stereo systems, balancing bass extension, cabinet size, output, and low distortion, while also being designed for everyday car-audio use by accounting for limited trunk space, installation constraints, and balanced sound.