Bach 9A vs Curry 10.5 DC
The Bach 9A has a wider cup diameter, the Curry 10.5 DC has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach 9A
• Cornet
Cup diameter16.05 mm / 0.6319 in
vs
Mouthpiece B
Curry 10.5 DC
• Cornet
Cup diameter15.88 mm / 0.6250 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bach 9A has a cup diameter of 16.05 mm / 0.6319 in compared to 15.88 mm / 0.6250 in on the Curry 10.5 DC — a difference of 0.18 mm / 0.0069 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.