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

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 3F — a difference of 0.70 mm / 0.0276 in. A wider cup generally produces a fuller, darker tone but requires more air support.

Bach 1½C vs Bach 3F

Name: Bach 3F
Brand: Bach

The Bach 1½C has a wider cup diameter, the Bach 1½C features a deeper cup.

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

How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).

Mouthpiece A

Bach 1½C

• Cornet

Cup depthMedium

Mouthpiece B

Bach 3F

• Cornet

Cup depthVery shallow

Cup Depth

The Bach 1½C has a medium cup while the Bach 3F has a very shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

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.