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

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

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

How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).

Mouthpiece A

Bach 11B

• Cornet

Cup depthDeep

Mouthpiece B

Bach 11C

• Cornet

Cup depthMedium

Cup Depth

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.

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.