Hand-lapped valves and slides
Hand-lapping is a time-consuming finishing process which results in an airtight valve/piston fit for noiseless, responsive action.
Well-balanced
The YSH-301WB is well-balanced so it is easy to hold while marching.
Heavy bracing throughout
Because the sousaphone is used in marching band, it has heavy bracing throughout the instrument to make it more durable at the vulnerable points.
Pressure formed tubing
Perfectly rounded tubing results in less turbulence and a smoother air flow, thus allowing for an excellent scale and reduced resistance.
Fiber-reinforced plastic
The material in the YSH-301WB makes it lightweight to reduce fatigue while marching. The ABS resin bell is durable yet lightweight.
Specifications
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Key: BB♭
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Bell Diameter: 663 mm (26 1/8″)
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Bore Size: 18.5 mm (0.728″)
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Body Material: Fiberglass Reinforced Plastic (FRP)
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Bell Material: ABS Resin
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Finish: Clear lacquer (slides, valve casing, and leadpipe)
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Valves: 3 front-action pistons, nickel-plated
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Mouthpiece: BB-67C4
