Jazz[edit]
Quartets are popular in jazz and jazz fusion music. Jazz quartet ensembles are often composed of a horn, classically clarinet (or saxophone, trumpet, etc.), a chordal instrument (e.g., electric guitar, piano, Hammond organ, vibraphone, etc.), a bass instrument (e.g., double bass, tuba or bass guitar) and a drum kit. This configuration is sometimes modified by using a second horn replacing the chordal instrument, such as a trumpet and saxophone with string bass and drum kit, or by using two chordal instruments (e.g., piano and electric guitar).