Marcinkiewicz E9M. Klein vs Yamaha TR-16C4
The Marcinkiewicz E9M. Klein has a wider cup diameter, the Marcinkiewicz E9M. Klein features a deeper cup, the Marcinkiewicz E9M. Klein has a larger throat opening.
Cup Diameter
The Marcinkiewicz E9M. Klein has a cup diameter of 17.32 mm / 0.6819 in compared to 17.00 mm / 0.6693 in on the Yamaha TR-16C4 — a difference of 0.32 mm / 0.0126 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Marcinkiewicz E9M. Klein has a deep cup while the Yamaha TR-16C4 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Marcinkiewicz E9M. Klein has a wider throat (3.66 mm / 0.1441 in vs 3.65 mm / 0.1437 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.