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Bach 12E vs Marcinkiewicz 8

The Marcinkiewicz 8 has a wider cup diameter, the Marcinkiewicz 8 features a deeper cup, the Marcinkiewicz 8 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 8
      • Trombone
      Cup diameter25.93 mm / 1.0209 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Marcinkiewicz 8 has a cup diameter of 25.93 mm / 1.0209 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 1.43 mm / 0.0563 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 8 details Bach 12E equivalents Marcinkiewicz 8 equivalents

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