Marcinkiewicz 306 vs Marcinkiewicz 3 / 5C
the Marcinkiewicz 3 / 5C features a deeper cup.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
Marcinkiewicz 306
• Cornet
Cup depthShallow
vs
Mouthpiece B
Marcinkiewicz 3 / 5C
• Cornet
Cup depthMedium
Cup Depth
The Marcinkiewicz 3 / 5C has a medium cup while the Marcinkiewicz 306 has a 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.