The built-in sound quality on TVs has gotten a lot better over the years, but not even the best TVs can compete with dedicated soundbars. If you want to improve your home entertainment sound, investing in a good soundbar is the way to go, and you don't need to spend a lot. The best cheap soundbars can bring you better dialogue quality from movies and TV shows, and even stream music over Bluetooth. It's time to abandon poor TV sound, turn up the volume and get bingeing. CNET provides expert, unbiased reviews of products and services. When we assign a score, we use a scale of 1-10. Each product we score is evaluated by criteria specific to its category with most assessing pricing, quality, features and performance. For $155, the 2.1 Soundbar includes a wireless subwoofer, HDMI connectivity and both Dolby Atmos and DTS:X decoding. Even better than the previous Vizio V21, this soundbars excels with movie soundtracks and sounds great with music, too.…