Conn Precision 4 vs Marcinkiewicz 10
The Marcinkiewicz 10 has a wider cup diameter, the Marcinkiewicz 10 features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Conn Precision 4
• Cornet
GeneralCup diameter16.41 mm / 0.6461 in
Best suited for
All-round versatile — balanced cup for general playing
Players with large lips; close to Bach 2C/Schilke 16C4
Bright tone; same as Model 3 with wide rim
vs
Mouthpiece B
Marcinkiewicz 10
• Cornet
Cup diameter16.84 mm / 0.6630 in
Best suited for
Orchestral playing — large cup for full, dark tone
Cup Diameter
The Marcinkiewicz 10 has a cup diameter of 16.84 mm / 0.6630 in compared to 16.41 mm / 0.6461 in on the Conn Precision 4 — a difference of 0.43 mm / 0.0169 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.