Which has a bigger cup — Bach 11B or Bach 11C?

Both mouthpieces have virtually identical cup diameters at 15.70 mm / 0.6181 in.

How does cup depth compare between Bach 11B and Bach 11C?

The Bach 11B has a deep cup while the Bach 11C has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 11B vs Bach 11C

Name: Bach 11C
Brand: Bach

the Bach 11B features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Bach 11B

• Cornet

Backbore—

Mouthpiece B

Bach 11C

• 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.