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Marcinkiewicz 9BB. Stroup vs Schilke 45B

The Marcinkiewicz 9BB. Stroup has a wider cup diameter, the Schilke 45B features a deeper cup, the Marcinkiewicz 9BB. Stroup has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
    Marcinkiewicz 9BB. Stroup
    • Trombone
    Throat diameter6.35 mm / 0.2500 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Schilke 45B
      • Trombone
      Throat diameter5.95 mm / 0.2343 in
      Best suited for
      📣High-volume projection — open throat for power

      Throat Diameter

      The Marcinkiewicz 9BB. Stroup has a wider throat (6.35 mm / 0.2500 in vs 5.95 mm / 0.2343 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.

      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 Marcinkiewicz 9BB. Stroup details Schilke 45B details Marcinkiewicz 9BB. Stroup equivalents Schilke 45B equivalents

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