The Bowers & Wilkins DB4S is a powerful active subwoofer designed to deliver deep, controlled bass performance for high-quality stereo and home theater systems. Featuring a long-throw Aerofoil bass driver powered by a high-efficiency Class D amplifier, the DB4S provides impactful low-frequency output with excellent control and minimal distortion. Its rigid cabinet and advanced DSP tuning ensure precise bass reproduction that integrates seamlessly with B&W loudspeakers, enhancing both music and movie playback.