In-Vehicle Dual 12-inch Rectangular Vented Subwoofer Box - 70 L / 35 Hz - 1018 × 398 × 398 mm

This Vented / Bass-Reflex enclosure is specifically designed for a 2-driver 12-inch rectangular subwoofer setup, balancing bass extension, cabinet size, and low distortion for both music systems and everyday car audio use. Constructed from 18 mm (3/4 inch) material with a simple rectangle shape, the cabinet features external dimensions of 1018 × 398 × 398 mm (40.51 × 15.69 × 15.69 in). To ensure high performance, a double-thickness front baffle increases rigidity and minimizes flex for high-output systems. The 70 L chamber is tuned to 35 Hz using one L-shaped slot port, which provides a port area optimized for high-airflow demand and large-excursion drivers in SPL-oriented applications. The design remains practical for limited trunk space and installation constraints while maintaining balanced sound.