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

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

Bach 11A vs Bach 11B

Name: Bach 11B
Brand: Bach

the Bach 11A features a deeper cup.

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

The internal diameter of the cup, measured at the widest point inside the rim.

Mouthpiece A

Bach 11A

• Cornet

Cup diameter15.70 mm / 0.6181 in

Mouthpiece B

Bach 11B

• Cornet

Cup diameter15.70 mm / 0.6181 in

Cup Diameter

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

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.