Bach 1½C vs Kelly 7C
The Bach 1½C has a wider cup diameter.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
Bach 1½C
• Cornet
Cup depthMedium
vs
Mouthpiece B
Kelly 7C
• Cornet
GeneralCup depthMedium
Best suited for
All-round versatile — balanced cup for general playing
Beginner / intermediate
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
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.