Marcinkiewicz 314 vs Monette Cornet C4LVS
The Marcinkiewicz 314 has a wider cup diameter, the Marcinkiewicz 314 features a deeper cup, the Marcinkiewicz 314 has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Marcinkiewicz 314
• Cornet
Cup diameter17.20 mm / 0.6772 in
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Monette Cornet C4LVS
• Cornet
Cup diameter16.20 mm / 0.6378 in
Best suited for
All-round versatile — balanced cup for general playing
Cup Diameter
The Marcinkiewicz 314 has a cup diameter of 17.20 mm / 0.6772 in compared to 16.20 mm / 0.6378 in on the Monette Cornet C4LVS — a difference of 1.00 mm / 0.0394 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.