David has a JBL SB400 and the audio is inconsistent, and muddy, especially for dialogue. It's maddening. Leo says that most TV programming is now mixed for surround sound and as such, the dialogue channel can sound muddier thanks with Dolby 5.1 enabled soundbars. If running through the ARC audio return channel, that can also contribute to it. Scott recommends going into the audio menu of the TV and look for the ARC setting. See if it sends 5.1 or 2.1. Choose 2.1 for that Soundbar since it doesn't have a center channel.