12-inch Rectangular Bass-Reflex In-Vehicle Subwoofer Box - 40L / 35Hz - 590 × 391 × 352 mm

This Vented / Bass-Reflex enclosure is specifically designed for a single 12-inch rectangular subwoofer, balancing bass extension, cabinet size, output, and low distortion for general-purpose home music and stereo systems. Built from 16 mm (5/8 inch) material in a simple rectangle shape, the cabinet measures 590 × 391 × 352 mm (23.2 × 15.41 × 13.87 in). It features a 40 L chamber tuned to 35 Hz and utilizes one L-shaped slot port with an 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 while remaining compact enough for everyday car-audio use with limited trunk space and installation constraints.