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Kelly 5C vs Monette Cornet C4LVS

The Kelly 5C has a wider cup diameter, the Kelly 5C features a deeper cup, the Kelly 5C has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
    Kelly 5C
    • Cornet
    General
    Cup diameter16.76 mm / 0.6598 in
    Best suited for
    📣High-volume projection — open throat for power
    📋Mid-range all-purpose
    vs
    Mouthpiece B
      Monette Cornet C4LVS
      • Cornet
      Cup diameter16.20 mm / 0.6378 in
      Best suited for
      🎵All-round versatile — balanced cup for general playing

      Cup Diameter

      The Kelly 5C has a cup diameter of 16.76 mm / 0.6598 in compared to 16.20 mm / 0.6378 in on the Monette Cornet C4LVS — a difference of 0.56 mm / 0.0220 in. A wider cup generally produces a fuller, darker tone but requires more air support.

      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 Monette Cornet C4LVS details Kelly 5C equivalents Monette Cornet C4LVS equivalents

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