Bach 11½C vs Bach 11B
The Bach 11B has a wider cup diameter, the Bach 11B features a deeper cup.
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
Bach 11½C
• Cornet
Backbore—
vs
Mouthpiece B
Bach 11B
• Cornet
Backbore—
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.