21" Dual Passive Subwoofer Go deeper than ever and command the ultimate low end with the SUBP221. As the heavyweight champion of the series, this dual 21-inch passive powerhouse is designed for maximum impact. With incredible peak power and a design that reaches the lowest frequencies, it does more than just play bass—it dominates the room. It is the perfect foundation for anyone who needs extreme sound for the largest venues. Earth-Shaking Power and Pro Durability The SUBP221 is built for scale
