Bach 1½C vs Kelly 6V
The Bach 1½C has a wider cup diameter, the Kelly 6V features a deeper cup, the Kelly 6V has a larger throat opening.
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 6V
• Cornet
Dark/DeepCup depth
Best suited for
High-volume projection — open throat for power
Deep V-cup to fill out cornet sound
Cup Depth
The Kelly 6V has a — cup while the Bach 1½C has a medium 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.