Schilke 38D vs Yamaha EP-51DS
The Yamaha EP-51DS has a wider cup diameter, the Yamaha EP-51DS features a deeper cup.
Mouthpiece A
Schilke 38D
• Baritone / Euphonium
Cup diameter19.73 mm / 0.7768 in
Cup depthMedium
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
vs
Mouthpiece B
Yamaha EP-51DS
• Baritone / Euphonium
Cup diameter25.24 mm / 0.9937 in
Cup depthDeep
Rim width—
Throat diameter7.11 mm / 0.2799 in
BackboreSemi-wide
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Diameter
The Yamaha EP-51DS has a cup diameter of 25.24 mm / 0.9937 in compared to 19.73 mm / 0.7768 in on the Schilke 38D — a difference of 5.51 mm / 0.2169 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Yamaha EP-51DS has a deep cup while the Schilke 38D has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
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.