Bach 11C vs Bach 12
The Bach 11C has a wider cup diameter, the Bach 12 features a deeper cup.
The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.
Mouthpiece A
Bach 11C
• Baritone / Euphonium
Rim width—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Bach 12
• Baritone / Euphonium
Rim width—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
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.