DTS Virtual X creates spacious 3D sound, including the feeling of height through audio processing techniques. Kick your listening experience up a notch with the subwoofer included with your Soundbar. It emphasizes bass for incredible sound that hits deeper and smoother notes - delivering theater-quality audio with your Soundbar. When you want to turn up the bass for maximum immersion, activate Bass Boost mode on the Soundbar. The included subwoofer takes the powerful, deeper bass to the next level, surrounding you with a fuller range of sound.