Which has a bigger cup — Kelly 24AW or Kelly 25?

The Kelly 24AW has a cup diameter of 31.24 mm / 1.2299 in compared to 30.99 mm / 1.2201 in on the Kelly 25 — a difference of 0.25 mm / 0.0098 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Kelly 24AW and Kelly 25?

The Kelly 24AW has a very deep cup while the Kelly 25 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Kelly 24AW vs Kelly 25

Name: Kelly 25
Brand: Kelly

The Kelly 24AW has a wider cup diameter, the Kelly 24AW features a deeper cup.

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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Kelly 24AW

• Tuba

General

MaterialLexan polycarbonate

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📋Tuba / sousaphone

Mouthpiece B

Kelly 25

• Tuba

General

MaterialLexan polycarbonate

Best suited for

📋General tuba / euphonium doubler

Material

Both mouthpieces share the same listed material (Lexan polycarbonate).

Which is better?

Both mouthpieces are categorized as "General" — the physical dimensions above will determine which suits your embouchure and playing style better.

Open in interactive tool + Add third mouthpiece Kelly 24AW details Kelly 25 details Kelly 24AW equivalents Kelly 25 equivalents

Kelly 24AW vs Kelly 25

Material

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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