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Bach 12C vs Bach 18

The Bach 12C has a wider cup diameter, the Bach 18 features a deeper cup.

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 12C
    • Cornet
    Backbore—
    vs
    Mouthpiece B
      Bach 18
      • Cornet
      Backbore—

      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 12C details Bach 18 details Bach 12C equivalents Bach 18 equivalents

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