Bach 1½C vs Kelly 5C
The Bach 1½C has a wider cup diameter, the Kelly 5C features a deeper cup, the Kelly 5C has a larger throat opening.
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
Bach 1½C
• Cornet
Backbore—
vs
Mouthpiece B
Kelly 5C
• Cornet
GeneralBackboreM
Best suited for
High-volume projection — open throat for power
Mid-range all-purpose
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.