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Bach 12E vs Curry 4C

The Curry 4C has a wider cup diameter, the Curry 4C features a deeper cup, the Curry 4C 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 12E
    • Trombone
    Cup diameter24.50 mm / 0.9646 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Curry 4C
      • Trombone
      Cup diameter25.73 mm / 1.0130 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Curry 4C has a cup diameter of 25.73 mm / 1.0130 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 1.23 mm / 0.0484 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 12E details Curry 4C details Bach 12E equivalents Curry 4C equivalents

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