A big screen TV makes a great holiday gift. But the flat sound that comes out of your new flat panel screen compromises the viewing experience. Upgrade your audio and pump up the volume a sound bar. They require minimal space and deliver big, room-filling sound. Choose it with built-in Wi-Fi or Bluetooth, and expand it with wireless rear speakers. The Sonos Beam is a great option when your space is at a premium, and you want advanced features. It’s expandable to create a full home theater system.