A nine-piece combo is a musical ensemble consisting of nine musicians. It is also known as a NONET, which is a term derived from the Latin word for nine. The nine-piece combo typically includes a rhythm section, such as drums, bass, and guitar, as well as a horn section, such as trumpets, trombones, and saxophones. This type of ensemble is often used in jazz music, but can also be used in other genres, such as funk, soul, and rock.