Which has a bigger cup — Kelly 5C or Yamaha CR-DUTOT-S?

The Yamaha CR-DUTOT-S has a cup diameter of 16.90 mm / 0.6654 in compared to 16.76 mm / 0.6598 in on the Kelly 5C — a difference of 0.14 mm / 0.0055 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Kelly 5C and Yamaha CR-DUTOT-S?

Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.

Kelly 5C vs Yamaha CR-DUTOT-S

Name: Yamaha CR-DUTOT-S
Brand: Yamaha

The Yamaha CR-DUTOT-S has a wider cup diameter, the Yamaha CR-DUTOT-S has a larger throat opening.

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

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Kelly 5C

• Cornet

General

BackboreM

Best suited for

📣High-volume projection — open throat for power

📋Mid-range all-purpose

Mouthpiece B

Yamaha CR-DUTOT-S

• Cornet

BackboreWide

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣High-volume projection — open throat for power

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 5C details Yamaha CR-DUTOT-S details Kelly 5C equivalents Yamaha CR-DUTOT-S equivalents

Kelly 5C vs Yamaha CR-DUTOT-S

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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