Conn Imp. Precision 1 vs Conn Precision 3A
the Conn Imp. Precision 1 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 1
• Trombone
OrchestralRim width—
Best suited for
Large bore trombones; symphony
Good clear tone; large bore symphonic
vs
Mouthpiece B
Conn Precision 3A
• Trombone
GeneralRim width—
Best suited for
General trombone use
Good round tone in all registers; all-around
Which is better?
The Conn Imp. Precision 1 is designed for orchestral playing, while the Conn Precision 3A targets general use. Your best choice depends on your musical context.