Marcinkiewicz CH W1 vs Marcinkiewicz 18
The Marcinkiewicz CH W1 has a wider cup diameter, the Marcinkiewicz 18 has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Marcinkiewicz CH W1
• Tuba
Cup diameter33.66 mm / 1.3252 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Marcinkiewicz 18
• Tuba
Cup diameter32.77 mm / 1.2902 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Marcinkiewicz CH W1 has a cup diameter of 33.66 mm / 1.3252 in compared to 32.77 mm / 1.2902 in on the Marcinkiewicz 18 — a difference of 0.89 mm / 0.0350 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.