
Yamaha YCB-623 Professional Tuba
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The Yamaha YCB-623 is a 4/4 C tuba with four front-action monel pistons and a thumb-activated fifth rotary valve. Its 18-5/8 inch yellow brass bell and .748-.768 inch bore give it a full, centered sound with the consistent intonation Yamaha is known for. It suits advancing students and working professionals who want a piston C tuba that plays in tune and holds up to daily use. Against European rotary C tubas it trades a darker rotary color for piston response and easier servicing, and it is a common step up from school-owned BBb instruments.
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Owners and teachers describe the YCB-623 as a dependable, well-built C tuba with solid intonation and easy response. It is often recommended as a step-up horn for students and a workhorse for professionals.
The Yamaha YCB-623 is a professional tuba in the key of C. It is a 4/4 size instrument built for consistent intonation and reliable performance.
It has four front action pistons made of monel alloy, plus a fifth valve that is a thumb-activated rotary valve. The bell is yellow brass and measures 18-5/8". The bore is .748-.768".








