Bach 1B vs Kelly 3C
The Kelly 3C has a wider cup diameter, the Kelly 3C features a deeper cup, the Kelly 3C has a larger throat opening.
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
Bach 1B
• Cornet
Backbore—
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Kelly 3C
• Cornet
GeneralBackboreL
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
All-purpose mid-range
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.