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Conn Precision 3A vs Conn Precision 4

the Conn Precision 4 features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
    Conn Precision 3A
    • Trombone
    General
    Cup depth
    Best suited for
    📋General trombone use
    🎶Good round tone in all registers; all-around
    vs
    Mouthpiece B
      Conn Precision 4
      • Trombone
      Orchestral
      Cup depth
      Best suited for
      📋Bass trombone
      🎶Full rich deep tone quality

      Cup Depth

      The Conn Precision 4 has a — cup while the Conn Precision 3A has a — cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      Which is better?

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

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