Conn Imp. Precision 4 vs Kelly 25
the Conn Imp. Precision 4 features a deeper cup.
Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.
Mouthpiece A
Conn Imp. Precision 4
• Tuba
GeneralMaterialSilver-plated brass
Best suited for
Small Eb bass
Full rich tone
vs
Mouthpiece B
Kelly 25
• Tuba
GeneralMaterialLexan polycarbonate
Best suited for
General tuba / euphonium doubler
Material
The Conn Imp. Precision 4 is described as Silver-plated brass, and the Kelly 25 as Lexan polycarbonate. Material affects mass, warmth, and how quickly the piece responds.
Which is better?
Both mouthpieces are categorized as "General" — the physical dimensions above will determine which suits your embouchure and playing style better.