Marcinkiewicz CH 15S vs Marcinkiewicz E17B. O'Donnell
The Marcinkiewicz E17B. O'Donnell has a wider cup diameter.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Marcinkiewicz CH 15S
• Trumpet
Cup diameter16.31 mm / 0.6421 in
vs
Mouthpiece B
Marcinkiewicz E17B. O'Donnell
• Trumpet
Cup diameter16.36 mm / 0.6441 in
Cup Diameter
The Marcinkiewicz E17B. O'Donnell has a cup diameter of 16.36 mm / 0.6441 in compared to 16.31 mm / 0.6421 in on the Marcinkiewicz CH 15S — a difference of 0.05 mm / 0.0020 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.