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Bach 10C vs Bach 9C

The Bach 9C has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
    Bach 10C
    • Cornet
    Backbore—
    Best suited for
    🎵All-round versatile — balanced cup for general playing
    vs
    Mouthpiece B
      Bach 9C
      • Cornet
      Backbore—
      Best suited for
      🎵All-round versatile — balanced cup for general playing

      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.

      Open in interactive tool + Add third mouthpiece Bach 10C details Bach 9C details Bach 10C equivalents Bach 9C equivalents

      Compare Bach 10C with others

      Compare Bach 9C with others

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