Which has a bigger cup — Bach 3E or Bach 8¾C?

The Bach 3E has a cup diameter of 16.30 mm / 0.6417 in compared to 16.10 mm / 0.6339 in on the Bach 8¾C — a difference of 0.20 mm / 0.0079 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 3E and Bach 8¾C?

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

Bach 3E vs Bach 8¾C

Name: Bach 8¾C
Brand: Bach

The Bach 3E 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 3E

• Cornet

Backbore—

Mouthpiece B

Bach 8¾C

• Cornet

Backbore—

Best suited for

🎺Lead / commercial — shallow cup for brightness and range

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.