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Bach 12E vs Marcinkiewicz 5F

The Marcinkiewicz 5F has a wider cup diameter, the Bach 12E features a deeper cup, the Marcinkiewicz 5F 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
      Marcinkiewicz 5F
      • Trombone
      Cup diameter25.78 mm / 1.0150 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Marcinkiewicz 5F has a cup diameter of 25.78 mm / 1.0150 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 1.28 mm / 0.0504 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 Marcinkiewicz 5F details Bach 12E equivalents Marcinkiewicz 5F equivalents

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