The AcousticPerformance AP-212sw is a premium, high performance, direct radiating dual 12inch subwoofer designed for use in portable and installed sound applications. The AP-212sw provides exceptional punch while maintaining ample extension so the musically important fundamentals are solidly and accurately reproduced. With a matching profile to the AP-4122m and AP5122m full range models, the AP-212sw is an ideal companion, providing added low frequency extension and musical accuracy to the AcousticPerformance portfolio.