Marcinkiewicz E14B. Shew #1 vs Yamaha TR-14B4-GP
The Yamaha TR-14B4-GP has a wider cup diameter, the Marcinkiewicz E14B. Shew #1 features a deeper cup, the Yamaha TR-14B4-GP has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Marcinkiewicz E14B. Shew #1
• Trumpet
Cup diameter16.81 mm / 0.6618 in
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Yamaha TR-14B4-GP
• Trumpet
Cup diameter16.85 mm / 0.6634 in
Cup Diameter
The Yamaha TR-14B4-GP has a cup diameter of 16.85 mm / 0.6634 in compared to 16.81 mm / 0.6618 in on the Marcinkiewicz E14B. Shew #1 — a difference of 0.04 mm / 0.0016 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.