Which has a bigger cup — Kelly 5G-EU or Schilke 38D?

The Kelly 5G-EU has a cup diameter of 25.40 mm / 1.0000 in compared to 19.73 mm / 0.7768 in on the Schilke 38D — a difference of 5.67 mm / 0.2232 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Kelly 5G-EU and Schilke 38D?

The Kelly 5G-EU has a — 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.

Kelly 5G-EU vs Schilke 38D

Name: Schilke 38D
Brand: Schilke

The Kelly 5G-EU has a wider cup diameter, the Kelly 5G-EU features a deeper cup.

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

The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Kelly 5G-EU

• Baritone / Euphonium

General

Rim width—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📋Euphonium general use

Mouthpiece B

Schilke 38D

• Baritone / Euphonium

Rim width—

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 Kelly 5G-EU details Schilke 38D details Kelly 5G-EU equivalents Schilke 38D equivalents

Kelly 5G-EU vs Schilke 38D

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

Compare Kelly 5G-EU with others

Compare Schilke 38D with others

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