This custom SPL box is engineered for maximum output, housing two 12-inch Pioneer Champion Pro Series subwoofers. Built from high-quality MDF with precision-tuned ports, it delivers hard-hitting bass with deep, resonant lows. Designed for SPL competitions and bass enthusiasts, this enclosure maximizes airflow and power handling, ensuring peak performance from the Champion Pro subs. With durable construction and optimized internal volume, it’s the ultimate setup for those who crave earth-shaking sound and relentless bass pressure.