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Schilke 52 vs Yamaha SL-48S-GP

The Schilke 52 has a wider cup diameter, the Yamaha SL-48S-GP features a deeper cup, the Schilke 52 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
    Schilke 52
    • Trombone
    Cup diameter25.78 mm / 1.0150 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Yamaha SL-48S-GP
      • Trombone
      Cup diameter25.25 mm / 0.9941 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Schilke 52 has a cup diameter of 25.78 mm / 1.0150 in compared to 25.25 mm / 0.9941 in on the Yamaha SL-48S-GP — a difference of 0.53 mm / 0.0209 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.

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