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Bach 8½A vs Conn Imp. Precision 4

The Conn Imp. Precision 4 has a wider cup diameter, the Bach 8½A 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 8½A
    • Cornet
    Throat diameter3.66 mm / 0.1441 in
    vs
    Mouthpiece B
      Conn Imp. Precision 4
      • Cornet
      General
      Throat diameter—
      Best suited for
      🎵All-round versatile — balanced cup for general playing
      📋Players with large full lips; most common surviving example
      🎶Bright tone; same as Model 3 with wide rim

      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 8½A details Conn Imp. Precision 4 details Bach 8½A equivalents Conn Imp. Precision 4 equivalents

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