The Yamaha YBB‑105MS is a convertible B♭ marching tuba crafted to bring orchestral-quality sound to the field without compromising playability. Though more compact and lightweight than full-sized models, it still delivers a surprisingly bold and authoritative tone, thanks to its efficient bore design. Its convertible leadpipe design allows quick transition between marching and concert setups, providing excellent value and versatility—especially for younger players, marching bands, or groups with tight budgets.
Key Features
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Compact & Lightweight Design
Tailored for small or younger musicians in marching contexts, this tuba is easier to handle while maintaining robust sound. -
Balanced Bore (0.661″ / 16.8 mm)
Offers a smooth blend of responsiveness and rich sonic projection. -
Convertible Leadpipes
Includes both marching and concert leadpipes, enabling seamless role-switching between field and stage. -
Hand-Fitted Valves & Slides
Precision-crafted for a snug fit, ensuring quiet, fluid operation and improved tuning accuracy. -
Heavy & Precisely Placed Bracing
Designed for durability under the strain of marching, the reinforced structure preserves tone quality even in rugged conditions -
Leadpipe Taper for Intonation
The extended taper delivers well-centered notes and stable intonation throughout performance -
Solid Build & Cost Efficiency
Provides authentic tuba sound and performance in a compact, budget-friendly package—ideal for educational and youth marching bands.


















