Which has a bigger cup — Bach 1¼C or Bach 3C?

The Bach 1¼C has a cup diameter of 17.00 mm / 0.6693 in compared to 16.30 mm / 0.6417 in on the Bach 3C — 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 1¼C and Bach 3C?

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

Bach 1¼C vs Bach 3C

Name: Bach 3C
Brand: Bach

The Bach 1¼C 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 1¼C

• Trumpet

Material—

Mouthpiece B

Bach 3C

• Trumpet

Material—

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.