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Schilke 45B vs Schilke 47C4

The Schilke 47C4 has a wider cup diameter.

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 45B
    • Trombone
    Cup diameter24.30 mm / 0.9567 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Schilke 47C4
      • Trombone
      Cup diameter25.10 mm / 0.9882 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Schilke 47C4 has a cup diameter of 25.10 mm / 0.9882 in compared to 24.30 mm / 0.9567 in on the Schilke 45B — a difference of 0.80 mm / 0.0315 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 45B details Schilke 47C4 details Schilke 45B equivalents Schilke 47C4 equivalents

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