Yamaha - YBB-105MS - Convertible BBb Tuba

The 105MS/105M is smaller and lightweight, allowing bands with small children to be able to march with a genuine tuba sound. Despite its smaller size, this instrument offers a surprisingly big tone. The 0.661" bore achieves the ideal balance between easy response and solid, authoritative sound, and the 105MS/105M has been designed to be easy to handle while marching. It's perfect for those facing budget restrictions as the convertible leadpipe makes it perfect for both concert or marching bands.

Please refer to table below for specs.


Hand-fitted valves and slides

Hand-fitted ensures an absolutely perfect fit and seal between the valve pistons and casing or slide parts. Such a fit helps to achieve smooth air flow and smooth action, and improves the response and intonation of thee instrument.

Heavy bracing

All Yamaha marching instruments have heavy bracing throughout, so they are more durable at vulnerable points and can withstand the rigors of use in a marching band.

Precision brace design and placement

The design and placement of the braces ensure maximum durability as well as optimum tone.

Leadpipe taper

Faultless intonation and well-centered notes are the result of the extended taper on the leadpipe.


Both marching and concert leadpipes included


  • Key: Bb
  • Body: Yellow brass
  • Bell Diameter: 366mm (14 3/8")
  • Bore Size: 16.8mm (0.661")
  • Length: 827mm (32 9/16")
  • Valves: 3 pistons
  • Finish: Silver plated (YBB-105MS) or clear lacquered (YBB-105M)
  • Weight: 6.2kg
  • Mouthpiece: BB-67
  • Case: Included

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