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Schilke 47B vs Yamaha SL-48L

The Yamaha SL-48L has a wider cup diameter, the Yamaha SL-48L 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 47B
    • Trombone
    Cup diameter24.87 mm / 0.9791 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Yamaha SL-48L
      • Trombone
      Cup diameter25.25 mm / 0.9941 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Yamaha SL-48L has a cup diameter of 25.25 mm / 0.9941 in compared to 24.87 mm / 0.9791 in on the Schilke 47B — a difference of 0.38 mm / 0.0150 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 Schilke 47B details Yamaha SL-48L details Schilke 47B equivalents Yamaha SL-48L equivalents

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