Schilke 30C2 vs Yamaha HR-35C4
The Yamaha HR-35C4 has a wider cup diameter, the Yamaha HR-35C4 has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Schilke 30C2
• French Horn
Cup diameter17.03 mm / 0.6705 in
vs
Mouthpiece B
Yamaha HR-35C4
• French Horn
Cup diameter18.08 mm / 0.7118 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Yamaha HR-35C4 has a cup diameter of 18.08 mm / 0.7118 in compared to 17.03 mm / 0.6705 in on the Schilke 30C2 — a difference of 1.05 mm / 0.0413 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.