Yamaha BB-BOBO-SOLO-GP vs Yamaha BB-BOBO-SOLO-S
Both mouthpieces share similar core dimensions — the differences are in the details.
Mouthpiece A
Yamaha BB-BOBO-SOLO-GP
• Tuba
Cup diameter32.20 mm / 1.2677 in
Cup depthShallow
Rim width—
Throat diameter7.50 mm / 0.2953 in
BackboreStandard
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha BB-BOBO-SOLO-S
• Tuba
Cup diameter32.20 mm / 1.2677 in
Cup depthShallow
Rim width—
Throat diameter7.50 mm / 0.2953 in
BackboreStandard
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 32.20 mm / 1.2677 in.
Cup Depth
Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
Throat diameters are essentially identical at 7.50 mm / 0.2953 in, so resistance feel will be comparable.
Which is better?
Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.