Ribbon mics can be excellent for voiceover work. Their proximity effect gives the big bottom that VO artists love and their smoothness and lack of sibilance make the engineers happy. Due to their consistent off-axis response, ribbons are especially useful if the VO artist is moving around. As the artist moves, the pickup remains uniform (as opposed to the tonal changes that take place when an artist goes on and off axis on a condenser mic).
Our active R-122 MKII and SF-24 mics, with their higher output and impedance matching circuitry, are especially recommended.