Which has a bigger cup — Denis Wick 5BS or Kelly 6-1/2AL?

The Denis Wick 5BS has a cup diameter of 25.73 mm compared to 25.15 mm on the Kelly 6-1/2AL — a difference of +0.58 mm. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Denis Wick 5BS and Kelly 6-1/2AL?

The Kelly 6-1/2AL has a very deep cup while the Denis Wick 5BS has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Denis Wick 5BS vs Kelly 6-1/2AL

The Denis Wick 5BS has a wider cup diameter, the Kelly 6-1/2AL 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

Denis Wick 5BS

• Trombone

Rim width6.64 mm

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Kelly 6-1/2AL

• Trombone

General

Rim width—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📋Standard trombone / baritone

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 Denis Wick 5BS details Kelly 6-1/2AL details Denis Wick 5BS equivalents Kelly 6-1/2AL equivalents

Denis Wick 5BS vs Kelly 6-1/2AL

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

Compare Denis Wick 5BS with others

Compare Kelly 6-1/2AL with others

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Denis Wick vs Kelly

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