Bach 2½C vs Kelly 7C-UK
The Kelly 7C-UK has a wider cup diameter.
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
Bach 2½C
• Cornet
Backbore—
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
Kelly 7C-UK
• Cornet
GeneralBackboreS
Best suited for
All-round versatile — balanced cup for general playing
Comfortable music-industry standard
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.