Bach 12 vs Kelly MC
The Kelly MC has a wider cup diameter, the Kelly MC features a deeper cup, the Bach 12 has a larger throat opening.
The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.
Mouthpiece A
Bach 12
• French Horn
Rim width—
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
GeneralRim width—
Best suited for
High-volume projection — open throat for power
All-purpose French horn
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.