Definitive's SuperCubes are a new breed of powered subwoofers which utilize unique technology and components in order to achieve state-of-the-art performance from remarkably small boxes. Remember, it is important to understand when you are evaluating the SuperCubes that you can not simply compare them to conventional subwoofers based on driver size. Because of their unique technology, the SuperCubes deliver far superior performance to conventional subwoofers which utilize drivers of 50% - 80% larger diameter. In fact, SuperCube I dramatically outperforms our previous 18" PF1800 in all important parameters.