Looking to update your TV's sound system to something more impressive, with a great soundbar at the center of it all? Sony's Bravia Theater System 6 packs an entire home audio setup into a single big box, and it's currently marked down to just $698 on Amazon, just over a $100 discount from its usual price of $800.SonyAmazonB&HWhile the setup might be a little more involved than a simple soundbar, there are some big payoffs. A true set of four speakers spread around your room gives a much fuller,