Universal box template
Single 12-inch Rectangular Vented Car Subwoofer Box - 45 L / 32 Hz - 646 × 426 × 311 mm

Description
This Vented / Bass-Reflex enclosure is specifically designed for a single 12-inch rectangular subwoofer, featuring a 45 L chamber tuned to 32 Hz. Built from 16 mm (5/8 inch) material in a simple rectangle shape, the external dimensions are 646 × 426 × 311 mm (25.41 × 16.78 × 12.27 in). For installation consistency and visual alignment, the design utilizes one L-shaped slot port positioned on the right side. The port area is optimized for high-output, large-excursion drivers and SPL-oriented use with high airflow demands. This box is engineered for everyday car-audio use, balancing sound quality with installation constraints and limited trunk space.