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Conn Imp. Precision 4 vs Kelly 25

the Conn Imp. Precision 4 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
    Conn Imp. Precision 4
    • Tuba
    General
    Rim width—
    Best suited for
    📋Small Eb bass
    🎶Full rich tone
    vs
    Mouthpiece B
      Kelly 25
      • Tuba
      General
      Rim width—
      Best suited for
      📋General tuba / euphonium doubler

      Which is better?

      Both mouthpieces are categorized as "General" — the physical dimensions above will determine which suits your embouchure and playing style better.

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