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Bach 12C vs Curry 7C

The Curry 7C has a wider cup diameter, the Curry 7C features a deeper cup, the Curry 7C has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
    Bach 12C
    • Trombone
    Cup diameter24.50 mm / 0.9646 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Curry 7C
      • Trombone
      Cup diameter24.74 mm / 0.9740 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Curry 7C has a cup diameter of 24.74 mm / 0.9740 in compared to 24.50 mm / 0.9646 in on the Bach 12C — a difference of 0.24 mm / 0.0094 in. A wider cup generally produces a fuller, darker tone but requires more air support.

      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 Curry 7C details Bach 12C equivalents Curry 7C equivalents

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