Vizio already has soundbars designed for smaller TVs (and medium-sized ones too), and now its back with a flagship model built for bigger screens. This new 54-inch model, available today, brings 103-decibel sound, complete with three channels and a 4-inch deep bass module. Like the smaller models, it also features Bluetooth streaming, and uses DTS audio processing to level out the volume so that youre not jolted off the couch when shows cut to a loud commercial break.