Conn Imp. Precision 3A vs Conn Imp. Precision 4
the Conn Imp. Precision 4 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 Imp. Precision 3A
• Trombone
GeneralRim width—
Best suited for
General trombone
Good round tone all-around
vs
Mouthpiece B
Conn Imp. Precision 4
• Trombone
OrchestralRim width—
Best suited for
Bass trombone / large bore tenor
Full rich deep tone
Which is better?
The Conn Imp. Precision 3A is designed for general playing, while the Conn Imp. Precision 4 targets orchestral use. Your best choice depends on your musical context.