Giardinelli S15 vs Marcinkiewicz CH 17S
The Giardinelli S15 has a wider cup diameter, the Marcinkiewicz CH 17S features a deeper cup, the Giardinelli S15 has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Giardinelli S15
• French Horn
Cup diameter17.50 mm / 0.6890 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Marcinkiewicz CH 17S
• French Horn
Cup diameter17.42 mm / 0.6858 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Diameter
The Giardinelli S15 has a cup diameter of 17.50 mm / 0.6890 in compared to 17.42 mm / 0.6858 in on the Marcinkiewicz CH 17S — a difference of 0.08 mm / 0.0031 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.