Here's a recently arrived Eastman EBB562 BBb rotary tuba. This is Eastman's 4/4 rotary tuba - it is definitely on the big side of the 4/4! This tuba has a huge sound but the medium sized .748' bore gives an excellent focus and efficiency while maintaining a solid core. I tend to find large bore rotor tubas difficult to slur smoothly but the .748" bore of this tuba makes keeping a clean slur a breeze. $9349
From the Eastman website:
The model EBB562 is a 4/4 size “Germanic” instrument with four rotary valves and a .748“ bore.
This tuba features a big open sound with good projection. It is the perfect choice for the player that
wants rotary valves, and doesn’t want the larger bore of the EBB623.
Key of BBb
4/4 size tuba with a 17 3/4” yellow brass bell
Yellow brass construction with nickel-silver valve slides
Four rotary valves through a .748” bore
Exquisitely finished in a clear lacquer
Durable case with wheels
Includes silver-plated Eastman mouthpiece