Which has a bigger cup — Bach 1¼C or Bach 2¾C?

The Bach 1¼C has a cup diameter of 17.00 mm / 0.6693 in compared to 16.40 mm / 0.6457 in on the Bach 2¾C — a difference of 0.60 mm / 0.0236 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 2¾C?

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

Bach 1¼C vs Bach 2¾C

Name: Bach 2¾C
Brand: Bach

The Bach 1¼C has a wider cup diameter.

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

The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.

Mouthpiece A

Bach 1¼C

• Trumpet

Throat diameter3.66 mm / 0.1441 in

Mouthpiece B

Bach 2¾C

• Trumpet

Throat diameter3.66 mm / 0.1441 in

Best suited for

🎵All-round versatile — balanced cup for general playing

Throat Diameter

Throat diameters are essentially identical at 3.66 mm / 0.1441 in, so resistance feel will be comparable.

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.

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Bach 1¼C vs Bach 2¾C

Throat Diameter

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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