Sumiko S5 Subwoofer (White) The Sumiko S.5 utilizes a custom, 8-inch, long throw woofer in a cast steel basket, providing an additional 50% greater surface area over the S.0 model. A high current, 150 watt, Class AB amplifier to delivers thrill and excitement to your music, movie or gaming experience. Combine multiple S.5 units for more even bass distribution and greater impact.