Conn Imp. Precision 3A vs Conn Precision 1
the Conn Precision 1 features a deeper cup.
Mouthpiece A
Conn Imp. Precision 3A
• Trombone
GeneralCup diameter—
Cup depth
Rim width—
Throat diameter—
Backbore—
Finish—
MaterialSilver-plated brass
Best suited for
General trombone
Good round tone all-around
vs
Mouthpiece B
Conn Precision 1
• Trombone
OrchestralCup diameter—
Cup depth
Rim width—
Throat diameter—
Backbore—
Finish—
MaterialSilver-plated brass
Best suited for
Large bore trombones; symphony work
Good clear tone; large bore symphonic
Cup Depth
The Conn Precision 1 has a — cup while the Conn Imp. Precision 3A has a — cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Material
Both mouthpieces share the same listed material (Silver-plated brass).
Which is better?
The Conn Imp. Precision 3A is designed for general playing, while the Conn Precision 1 targets orchestral use. Your best choice depends on your musical context.