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Kelly 6V vs Monette Cornet C4LVS

The Monette Cornet C4LVS has a wider cup diameter, the Kelly 6V features a deeper cup, the Kelly 6V 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 6V
    • Cornet
    Dark/Deep
    Cup diameter16.00 mm / 0.6299 in
    Best suited for
    📣High-volume projection — open throat for power
    📋Deep V-cup to fill out cornet sound
    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 Monette Cornet C4LVS has a cup diameter of 16.20 mm / 0.6378 in compared to 16.00 mm / 0.6299 in on the Kelly 6V — a difference of 0.20 mm / 0.0079 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 6V details Monette Cornet C4LVS details Kelly 6V equivalents Monette Cornet C4LVS equivalents

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