Listen to String Quartet No. 6 in B-Flat Major, Op. 18: I. Allegro con brio online. String Quartet No. 6 in B-Flat Major, Op. 18: I. Allegro con brio is an English language song and is sung by Konzentration Musikexperten and Studying Music. String Quartet No. 6 in B-Flat Major, Op. 18: I. Allegro con brio, from the album Beethoven to Work – Best Classical Music for Study, Relaxation Sounds, Focus, Concentration, Einstein Effect, was released in the year 2017. The duration of the song is 3:00. Download English songs online from JioSaavn.