Which has a bigger cup — Giardinelli 1GM or Kelly SYMPHONY-LS-SS?

The Giardinelli 1GM has a cup diameter of 27.00 mm / 1.0630 in compared to 25.65 mm / 1.0098 in on the Kelly SYMPHONY-LS-SS — a difference of 1.35 mm / 0.0531 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Giardinelli 1GM and Kelly SYMPHONY-LS-SS?

The Kelly SYMPHONY-LS-SS has a — cup while the Giardinelli 1GM has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Giardinelli 1GM vs Kelly SYMPHONY-LS-SS

Name: Kelly SYMPHONY-LS-SS
Brand: Kelly

The Giardinelli 1GM has a wider cup diameter, the Kelly SYMPHONY-LS-SS 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

Giardinelli 1GM

• Trombone

Rim width—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣High-volume projection — open throat for power

Mouthpiece B

Kelly SYMPHONY-LS-SS

• Trombone

Orchestral

Rim width—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📋Symphonic trombone

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 1GM details Kelly SYMPHONY-LS-SS details Giardinelli 1GM equivalents Kelly SYMPHONY-LS-SS equivalents

Giardinelli 1GM vs Kelly SYMPHONY-LS-SS

Playing Characteristics

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What Changes If You Switch?

Which is better?

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