Listen to String Quartet No. 18 in A Major, K.464 (Haydn-Quartet No.5") Op. 10/5: I. Allegro online. String Quartet No. 18 in A Major, K.464 (Haydn-Quartet No.5") Op. 10/5: I. Allegro is an English language song and is sung by Hungarian String Quartet. String Quartet No. 18 in A Major, K.464 (Haydn-Quartet No.5") Op. 10/5: I. Allegro, from the album Mozart for Babies, Vol. 2, was released in the year 2014. The duration of the song is 6:35. Download English songs online from JioSaavn.