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Schilke 45B vs Schilke 52

The Schilke 52 has a wider cup diameter, the Schilke 45B 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
Mouthpiece A
    Schilke 45B
    • Trombone
    Cup diameter24.30 mm / 0.9567 in
    Cup depthMedium
    Rim width—
    Throat diameter5.95 mm / 0.2343 in
    Backbore15/64 .2344"
    Finish—
    Material—
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Schilke 52
      • Trombone
      Cup diameter25.78 mm / 1.0150 in
      Cup depthShallow
      Rim width—
      Throat diameter6.75 mm / 0.2657 in
      Backbore17/64.2656"
      Finish—
      Material—
      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 24.30 mm / 0.9567 in on the Schilke 45B — a difference of 1.48 mm / 0.0583 in. A wider cup generally produces a fuller, darker tone but requires more air support.

      Cup Depth

      The Schilke 45B has a medium cup while the Schilke 52 has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      Throat Diameter

      The Schilke 52 has a wider throat (6.75 mm / 0.2657 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.

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