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Bach 18D vs Marcinkiewicz 8H-S

The Marcinkiewicz 8H-S has a wider cup diameter, the Marcinkiewicz 8H-S 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 18D
    • Trombone
    Cup diameter24.20 mm / 0.9528 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Marcinkiewicz 8H-S
      • Trombone
      Cup diameter26.06 mm / 1.0260 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Marcinkiewicz 8H-S has a cup diameter of 26.06 mm / 1.0260 in compared to 24.20 mm / 0.9528 in on the Bach 18D — a difference of 1.86 mm / 0.0732 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 18D details Marcinkiewicz 8H-S details Bach 18D equivalents Marcinkiewicz 8H-S equivalents

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