Bach Mega Tone Cornet 5B vs Marcinkiewicz 11
The Marcinkiewicz 11 has a wider cup diameter.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach Mega Tone Cornet 5B
• Cornet
Cup diameter16.25 mm / 0.6398 in
vs
Mouthpiece B
Marcinkiewicz 11
• Cornet
Cup diameter16.31 mm / 0.6421 in
Cup Diameter
The Marcinkiewicz 11 has a cup diameter of 16.31 mm / 0.6421 in compared to 16.25 mm / 0.6398 in on the Bach Mega Tone Cornet 5B — a difference of 0.06 mm / 0.0024 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.