4-Valve 5/4 convertible.
BBb 5/4 Size marching tuba offers full-bodied, rich sound and excellent projection. Outstanding intonation is achieved with the tune-any-note feature. Kanstul is one of the greatest brass design innovators and Tama has a solid understanding of marching bands' needs. It is an ideal marriage of core competencies that has resulted in a new alternative solution for marching band challenges.