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Yamaha Professional Model BBb Tuba YBB-631SYamaha's professional model background brass are world-renown for their blend of traditional warm, rich sound, combined with highly accurate intonation and easy playability. Developed in close cooperation with top artists, they represent the state-of-the-art in brass instrument design and manufacture, and are ideal for either solo performance or providing a secure foundation for any ensemble. The 631 is a professional BBb tuba with a powerful big sound full of depth, and richness. It has accurate intonation, a quick response, and a comfortable playability. Specifications Key: In BBb Valves: 3 pistons, 1 side piston Compensating system Bell: Yellow brass, 443mm (17-1/2") Bore: 17.5-19.5mm (0.689-0.768") Finish: Clear lacquer Mouthpiece: 67C4 Silver-plate: YBB-631S |