Conn Imp. Precision 1 vs Conn Imp. Precision 3
Both mouthpieces share similar core dimensions — the differences are in the details.
The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.
Mouthpiece A
Conn Imp. Precision 1
• Trombone
OrchestralRim width—
Best suited for
Large bore trombones; symphony
Good clear tone; large bore symphonic
vs
Mouthpiece B
Conn Imp. Precision 3
• Trombone
GeneralRim width—
Best suited for
Large lips; all band work
Full round tone
Which is better?
The Conn Imp. Precision 1 is designed for orchestral playing, while the Conn Imp. Precision 3 targets general use. Your best choice depends on your musical context.