Which has a bigger cup — Bach 1½C or Bach 11A?

The Bach 1½C has a cup diameter of 17.00 mm / 0.6693 in compared to 15.70 mm / 0.6181 in on the Bach 11A — a difference of 1.30 mm / 0.0512 in. A wider cup generally produces a fuller, darker tone but requires more air support.

Bach 1½C vs Bach 11A

Name: Bach 11A
Brand: Bach

The Bach 1½C has a wider cup diameter, the Bach 11A 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 1½C

• Cornet

Cup depthMedium

Mouthpiece B

Bach 11A

• Cornet

Cup depthVery deep

Cup Depth

The Bach 11A has a very deep cup while the Bach 1½C 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.