Features This two-channel soundbar speaker features dual 3-1/2-inch (89-millimeter) woofers, two 1-inch (25-millimeter) tweeters, a built-in amplifier that offers up to 120 watts, HARMAN Display Surround technology for 3D sound and dual-positioning equalization that optimizes the soundbar’s performance based on its location & Its high-excursion drivers and precision bass port work to deliver powerful, resounding bass, so there’s no need to add a separate subwoofer.