Which has a bigger cup — Bach 10 or Bach 10½CW?

The Bach 10 has a cup diameter of 16.00 mm / 0.6299 in compared to 15.90 mm / 0.6260 in on the Bach 10½CW — a difference of 0.10 mm / 0.0039 in. A wider cup generally produces a fuller, darker tone but requires more air support.

Bach 10 vs Bach 10½CW

Name: Bach 10½CW
Brand: Bach

The Bach 10 has a wider cup diameter, the Bach 10 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 10

• Cornet

Cup depthVery deep

Mouthpiece B

Bach 10½CW

• Cornet

Cup depthMedium

Cup Depth

The Bach 10 has a very deep cup while the Bach 10½CW 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.