Bach 2½C vs Marcinkiewicz 15
The Bach 2½C has a wider cup diameter, the Marcinkiewicz 15 features a deeper cup, the Marcinkiewicz 15 has a larger throat opening.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Bach 2½C
• Cornet
Throat diameter3.66 mm / 0.1441 in
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
Marcinkiewicz 15
• Cornet
Throat diameter3.73 mm / 0.1469 in
Throat Diameter
The Marcinkiewicz 15 has a wider throat (3.73 mm / 0.1469 in vs 3.66 mm / 0.1441 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.