Kelly MC vs Yamaha HR-35C4
The Yamaha HR-35C4 has a wider cup diameter, the Kelly MC features a deeper cup, the Yamaha HR-35C4 has a larger throat opening.
Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.
Mouthpiece A
Kelly MC
• French Horn
GeneralMaterialLexan polycarbonate
Best suited for
High-volume projection — open throat for power
All-purpose French horn
vs
Mouthpiece B
Yamaha HR-35C4
• French Horn
Material—
Best suited for
High-volume projection — open throat for power
Material
The Kelly MC is described as Lexan polycarbonate, and the Yamaha HR-35C4 as unspecified. Material affects mass, warmth, and how quickly the piece responds.
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.