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Bach 12C vs Conn Precision 3

the Conn Precision 3 features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
    Bach 12C
    • Trombone
    Throat diameter5.85 mm / 0.2303 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Conn Precision 3
      • Trombone
      General
      Throat diameter—
      Best suited for
      📋Musicians with large lips; all kinds of band work
      🎶Full round tone; ideal for large lips

      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 Bach 12C details Conn Precision 3 details Bach 12C equivalents Conn Precision 3 equivalents

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