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Bach 12E vs Curry 12S

The Bach 12E has a wider cup diameter, the Curry 12S 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 12S
      • Trombone
      Cup diameter24.23 mm / 0.9540 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Bach 12E has a cup diameter of 24.50 mm / 0.9646 in compared to 24.23 mm / 0.9540 in on the Curry 12S — a difference of 0.27 mm / 0.0106 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 12S details Bach 12E equivalents Curry 12S equivalents

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