The tuba is the lone giant, since most orchestras only have one. Even though all brass instruments have a bell at the end of the instrument where the sound comes out, the tuba is the only member of the brass family whose bell points up at the ceiling. Approximately eighteen feet of tubing separate the mouthpiece and the bell. Like the double bass, the tuba provides depth and stability to the orchestra.
Principal Tuba, Robert Machray Ward Chair