Which has a bigger cup — Giardinelli 5D or Kelly 5G-EU-SS?

The Kelly 5G-EU-SS has a cup diameter of 25.40 mm / 1.0000 in compared to 25.00 mm / 0.9843 in on the Giardinelli 5D — a difference of 0.40 mm / 0.0157 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Giardinelli 5D and Kelly 5G-EU-SS?

The Kelly 5G-EU-SS has a — cup while the Giardinelli 5D has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Giardinelli 5D vs Kelly 5G-EU-SS

Name: Kelly 5G-EU-SS
Brand: Kelly

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

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

The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.

Mouthpiece A

Giardinelli 5D

• Baritone / Euphonium

Throat diameter6.00 mm / 0.2362 in

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣High-volume projection — open throat for power

Mouthpiece B

Kelly 5G-EU-SS

• Baritone / Euphonium

General

Throat diameter—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📋Euphonium general use

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 Giardinelli 5D details Kelly 5G-EU-SS details Giardinelli 5D equivalents Kelly 5G-EU-SS equivalents

Giardinelli 5D vs Kelly 5G-EU-SS

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

Compare Giardinelli 5D with others

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Giardinelli vs Kelly

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