Whether it's a presentation, documentary or a straight narration, I bring two important qualities: authoritativeness and clarity. Put simply, I practice the script until I project an air of authority on its subject. For these types of voiceover, my timbre is rich and my pitch is mid to deep, depending on client preference.
For commercials, I match my tone to the direction I’m given and the product type. In an ad for a hamburger joint, I would bring a medium pitch, and combine a playful tone with loose enunciation to give a feeling of ‘cool’ to the reading. If the ad is for a Land Rover, you'll get a deep voice, a nonspecific British accent and a tone to match the copy. For something like a bumper for a rock radio station, I can go very deep and extremely throaty to pull off a sound to accompany a screaming guitar. With a little audio compression in post-production, I can even read for film trailers. Finally, I can easily pull off the kind of higher-pitched, energetic voice that is used in very positive, upbeat advertising.