How low could johnny cash sing?

Johnny Cash had a bass-baritone voice that could reach as low as the note E2, which is two octaves below middle C. This remarkable vocal range allowed him to perform a diverse repertoire of songs, including his signature baritone works, such as "Ring of Fire" and "Folsom Prison Blues," as well as deep, resonant versions of other artists' songs, such as his cover of Nine Inch Nails' "Hurt"