Bach 10½C vs Marcinkiewicz E9M. Klein
The Marcinkiewicz E9M. Klein has a wider cup diameter, the Marcinkiewicz E9M. Klein features a deeper cup.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Bach 10½C
• Trumpet
Throat diameter3.66 mm / 0.1441 in
vs
Mouthpiece B
Marcinkiewicz E9M. Klein
• Trumpet
Throat diameter3.66 mm / 0.1441 in
Best suited for
Orchestral playing — large cup for full, dark tone
Throat Diameter
Throat diameters are essentially identical at 3.66 mm / 0.1441 in, so resistance feel will be comparable.
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.