Which has a bigger cup — Bach 10C or Bach 11¾C?

The Bach 10C has a cup diameter of 16.00 mm / 0.6299 in compared to 15.60 mm / 0.6142 in on the Bach 11¾C — a difference of 0.40 mm / 0.0157 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 10C and Bach 11¾C?

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

Bach 10C vs Bach 11¾C

Name: Bach 11¾C
Brand: Bach

The Bach 10C has a wider cup diameter.

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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 10C

• Cornet

Material—

Best suited for

🎵All-round versatile — balanced cup for general playing

Mouthpiece B

Bach 11¾C

• Cornet

Material—

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.