Bach 2½C vs Conn Imp. Precision 4
The Conn Imp. Precision 4 has a wider cup diameter.
Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.
Mouthpiece A
Bach 2½C
• Cornet
Material—
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
Conn Imp. Precision 4
• Cornet
GeneralMaterialSilver-plated brass
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
Material
The Bach 2½C is described as unspecified, and the Conn Imp. Precision 4 as Silver-plated brass. 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.