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Conn Imp. Precision 1 vs Yamaha CR-14ES-GP

The Yamaha CR-14ES-GP has a wider cup diameter, the Conn Imp. Precision 1 features a deeper cup.

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
    Conn Imp. Precision 1
    • Cornet
    General
    Cup diameter16.56 mm / 0.6520 in
    Best suited for
    📋All-around; comfortable popular model
    🎶Full round tone especially on low notes
    vs
    Mouthpiece B
      Yamaha CR-14ES-GP
      • Cornet
      Cup diameter16.86 mm / 0.6638 in
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone
      📣High-volume projection — open throat for power

      Cup Diameter

      The Yamaha CR-14ES-GP has a cup diameter of 16.86 mm / 0.6638 in compared to 16.56 mm / 0.6520 in on the Conn Imp. Precision 1 — a difference of 0.30 mm / 0.0118 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 Conn Imp. Precision 1 details Yamaha CR-14ES-GP details Conn Imp. Precision 1 equivalents Yamaha CR-14ES-GP equivalents

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