Which has a bigger cup — Bach 1½C or Bach 3CW?

The Bach 1½C has a cup diameter of 17.00 mm / 0.6693 in compared to 16.30 mm / 0.6417 in on the Bach 3CW — a difference of 0.70 mm / 0.0276 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1½C and Bach 3CW?

Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.

Bach 1½C vs Bach 3CW

Name: Bach 3CW
Brand: Bach

The Bach 1½C has a wider cup diameter.

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 1½C

• Cornet

Backbore—

Mouthpiece B

Bach 3CW

• Cornet

Backbore—

Best suited for

🎵All-round versatile — balanced cup for general playing

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.