Bach 22 vs Yamaha BB-65
The Bach 22 has a wider cup diameter, the Yamaha BB-65 has a larger throat opening.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Bach 22
• Tuba
Throat diameter8.33 mm / 0.3280 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha BB-65
• Tuba
Throat diameter8.35 mm / 0.3287 in
Best suited for
High-volume projection — open throat for power
Throat Diameter
The Yamaha BB-65 has a wider throat (8.35 mm / 0.3287 in vs 8.33 mm / 0.3280 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.