Home › Trombone › Schilke 45B vs Schilke 51

Schilke 45B vs Schilke 51

The Schilke 51 has a wider cup diameter, the Schilke 51 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 45B
    • Trombone
    Cup diameter24.30 mm / 0.9567 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Schilke 51
      • Trombone
      Cup diameter25.63 mm / 1.0091 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Schilke 51 has a cup diameter of 25.63 mm / 1.0091 in compared to 24.30 mm / 0.9567 in on the Schilke 45B — a difference of 1.33 mm / 0.0524 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 51 details Schilke 45B equivalents Schilke 51 equivalents

      Compare Schilke 45B with others

      Compare Schilke 51 with others

      Popular Trombone comparisons

      Browse by specification