Bach 12C vs Bach 15EW

The Bach 12C has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.
Mouthpiece A
    Bach 12C
    • Baritone / Euphonium
    Material
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Bach 15EW
      • Baritone / Euphonium
      Material
      Best suited for
      📣High-volume projection — open throat for power

      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 15EW details Bach 12C equivalents Bach 15EW equivalents