Engadget
How to improve your audio quality on Netflix

Netflix selects the highest-quality audio stream available, often 5.1 or Dolby Atmos, even on basic-speaker TVs. Switching to the stereo track (e.g., English [Original]) in the Audio and Subtitles menu restores clear, louder dialogue. If problems remain, verify HDMI cables, firmware, external audio settings, and set playback quality to “High.”