Vocal Spectrum

Vocal Spectrum is a barbershop quartet from St. Charles, Missouri. In 2004, Vocal Spectrum won the Barbershop Harmony Society's International Collegiate Quartet Contest, and on July 8, 2006, they became International Champions, winning the society's International Quartet Contest. A distinctive feature of the quartet is tenor Tim Waurick's ability to sustain notes for upwards of 30 seconds, and the tenor's and lead's incredibly high vocal range, featured in many of the group's recordings and live shows.

The quartet's run for the title is featured in the 2009 feature documentary American Harmony.