Conn Precision 2 vs Kelly 25
the Conn Precision 2 features a deeper cup.
The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.
Mouthpiece A
Conn Precision 2
• Tuba
GeneralRim width—
Best suited for
BBb bass; general use
Full rich tone in all registers
vs
Mouthpiece B
Kelly 25
• Tuba
GeneralRim width—
Best suited for
General tuba / euphonium doubler
Which is better?
Both mouthpieces are categorized as "General" — the physical dimensions above will determine which suits your embouchure and playing style better.