King voices are authoritative, and you could say they're usually above the law. King is the title given to a male monarch in the prehistorian context, where contemporary indigenous people belonged to kingdoms. King, in this context, is the highest rank anyone could ever have. In the modern context, a king refers to a leader that rules a modern monarchy. There are many monarchies in today's modern setting that can be constitutional and absolute. Kings have specific names in different cultural backgrounds, which is something you should consider as you work on your voice-over project.
When you use a king's voice in a voice-over, you establish a specific context because kingship relates to owning a kingdom. This voice is commonly used in movie creations that are anchored in the prehistoric kingdom setup. It could be a TV series, a short film, cartoons, or an animation creation. King voices can also be used in video games and documentaries to put scenes into perspective. You need a voice actor who can pull off a bold, distinct, and echoing king voice. The characteristics of the king should shape their voice and create an image in people's heads as they listen.
Everyone can relate to a king's voice, which means you can target all audiences with this voice. The kind of project you're working on should determine the audience you target. If, for instance, you're working on a documentary, you would target audiences that are interested in what you're documenting.
King voices should be authoritative, final, and loud. A king is an influential person who is beyond reproach.