VIZIO SB3851-D0 SmartCast 38&rdquo; 5.1 Sound Bar System (2016 Model) The complete 5.1 channel true surround sound home theater solution with incredible audio performance: 101 dB of room filling, crystal clear sound with less than 1% total harmonic distortion Download the VIZIO Smart Cast app2 to turn your smartphone or tablet into a powerful touchscreen remote Simply tap the Cast button from 100+ audio apps you already know and love to start playing on your sound bar.