Marcinkiewicz 6C (Standard) vs Marcinkiewicz 9
The Marcinkiewicz 6C (Standard) has a wider cup diameter.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Marcinkiewicz 6C (Standard)
• Cornet
Cup diameter16.87 mm / 0.6642 in
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Marcinkiewicz 9
• Cornet
Cup diameter16.84 mm / 0.6630 in
Best suited for
Orchestral playing — large cup for full, dark tone
Cup Diameter
The Marcinkiewicz 6C (Standard) has a cup diameter of 16.87 mm / 0.6642 in compared to 16.84 mm / 0.6630 in on the Marcinkiewicz 9 — a difference of 0.03 mm / 0.0012 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.