Upgrade your TVs audio with VIZIO's 38" 2.1 Home Theater Sound Bar with Wireless Subwoofer. The perfect addition to any small to medium sized HDTV, this sound bar connects easily to your TV with just one cable. The wireless subwoofer adds bass missing from your TV, all without the need to run any extra wires. Built-in Bluetooth allows you to wirelessly stream music from a smartphone or tablet, while Dolby Digital and DTS Digital Surround audio technologies turn movies, TV and games into an immersive audio experience. Rated at 100dB with less than 1% Total Harmonic Distortion, the S3821w is one serious audio upgrade. Sound Pressure Level measured using pink noise at 1 meter, C-weighted. Total harmonic distortion calculated as electrical measurement of amplifier distortion.