Which has a bigger cup — Schilke 38D or Schilke 51D?

The Schilke 51D has a cup diameter of 25.55 mm / 1.0059 in compared to 19.73 mm / 0.7768 in on the Schilke 38D — a difference of 5.82 mm / 0.2291 in. A wider cup generally produces a fuller, darker tone but requires more air support.

Schilke 38D vs Schilke 51D

Name: Schilke 51D
Brand: Schilke

The Schilke 51D has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).

Mouthpiece A

Schilke 38D

• Baritone / Euphonium

Cup depthMedium

Mouthpiece B

Schilke 51D

• Baritone / Euphonium

Cup depthMedium

Best suited for

📣High-volume projection — open throat for power

Cup Depth

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

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.