system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is dialogue in movies whisper quiet, then gunshots and explosions happen and damn near blow your speakers?
gpt
When using your tv's built-in stereo speakers, go to your set-top box's settings and play around with the dynamic range setting.  
  
It's because you aren't using a surround sound system. Movies are made for a surround sound system, dialogue is on a dedicated center channel, and all non-dialogue audio goes on the other channels, when listening to your tv's built-in stereo speakers, the dialogue channel is mixed with the other sounds.  
  
Edit- for using VLC and stereo speakers, use dynamic range compression, set a low value for threshold (at what volume to activate compression), and play around with some of the other settings as well, such as gain.  
  
Edit again- for surround sound systems, increase the volume of the center channel and play around with the dynamic range.