Bach 11 vs Kelly MC
The Kelly MC has a wider cup diameter, the Kelly MC features a deeper cup, the Bach 11 has a larger throat opening.
Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.
Mouthpiece A
Bach 11
• French Horn
Material—
Best suited for
All-round versatile — balanced cup for general playing
High-volume projection — open throat for power
vs
Mouthpiece B
Kelly MC
• French Horn
GeneralMaterialLexan polycarbonate
Best suited for
High-volume projection — open throat for power
All-purpose French horn
Material
The Bach 11 is described as unspecified, and the Kelly MC as Lexan polycarbonate. 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.