Home › Trombone › Conn Imp. Precision 3 vs Conn Imp. Precision 4

Conn Imp. Precision 3 vs Conn Imp. Precision 4

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 3
    • Trombone
    General
    Rim width—
    Best suited for
    📋Large lips; all band work
    🎶Full round tone
    vs
    Mouthpiece B
      Conn Imp. Precision 4
      • Trombone
      Orchestral
      Rim width—
      Best suited for
      📋Bass trombone / large bore tenor
      🎶Full rich deep tone

      Which is better?

      The Conn Imp. Precision 3 is designed for general playing, while the Conn Imp. Precision 4 targets orchestral use. Your best choice depends on your musical context.

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