sousaphone

A large brass instrument, similar in range to the tuba, having a flaring bell and a shape adapted to being carried in marching bands.

A valved brass instrument with the same length as a tuba, but shaped differently so that the bell is above the head, that the valves are situated directly in front of the musical instruments and a few inches above the waist, and that most of the weight rests on one shoulder.

the lowest brass wind instrument