Home › Trombone › Schilke 42B vs Schilke 45B

Schilke 42B vs Schilke 45B

The Schilke 45B has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Schilke 42B
    • Trombone
    Cup diameter22.99 mm / 0.9051 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 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

      Cup Diameter

      The Schilke 45B has a cup diameter of 24.30 mm / 0.9567 in compared to 22.99 mm / 0.9051 in on the Schilke 42B — a difference of 1.31 mm / 0.0516 in. A wider cup generally produces a fuller, darker tone but requires more air support.

      Cup Depth

      Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.

      Throat Diameter

      Throat diameters are essentially identical at 5.95 mm / 0.2343 in, so resistance feel will be comparable.

      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 42B details Schilke 45B details Schilke 42B equivalents Schilke 45B equivalents

      Compare Schilke 42B with others

      Compare Schilke 45B with others

      Popular Trombone comparisons

      Browse by specification