For the pinnacle of surround sound immersion and convenience, the VIZIO S4251w 5.1 Sound Bar sets the bar exceptionally high. Designed to fit any HDTV 47" and larger, this three channel sound bar features a wireless subwoofer and dedicated rear satellite speakers putting you in the center of the action. Built-in Bluetooth allows you to wireless stream music from a smartphone or tablet while Dolby Digital, DTS Digital Surround audio technologies bring movies, music and games to life in crystal clear detail. Rated at 102dB with less than 1% Total Harmonic Distortion, the S4251w is a true premium surround sound system that turns any room into the ultimate home theater. Sound Pressure Level measured using pink noise at 1 meter, C-weighted. Total harmonic distortion calculated as electrical measurement of amplifier distortion.