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Conn Precision 1 vs Schilke 51D

the Conn Precision 1 features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Conn Precision 1
    • Trombone
    Orchestral
    Cup diameter—
    Cup depth
    Rim width—
    Throat diameter—
    Backbore—
    Finish—
    MaterialSilver-plated brass
    Best suited for
    📋Large bore trombones; symphony work
    🎶Good clear tone; large bore symphonic
    vs
    Mouthpiece B
      Schilke 51D
      • Trombone
      Cup diameter25.55 mm / 1.0059 in
      Cup depthMedium
      Rim width—
      Throat diameter7.04 mm / 0.2772 in
      BackboreJ .277"
      Finish—
      Material—
      Best suited for
      📣High-volume projection — open throat for power

      Cup Depth

      The Conn Precision 1 has a — cup while the Schilke 51D has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      Material

      The Conn Precision 1 is described as Silver-plated brass, and the Schilke 51D as unspecified. Material affects mass, warmth, and how quickly the piece responds.

      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 Precision 1 details Schilke 51D details Conn Precision 1 equivalents Schilke 51D equivalents

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