Conn Imp. Precision 4 vs Conn Precision 3A
the Conn Imp. Precision 4 features a deeper cup.
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
Conn Imp. Precision 4
• Trombone
OrchestralBackbore—
Best suited for
Bass trombone / large bore tenor
Full rich deep tone
vs
Mouthpiece B
Conn Precision 3A
• Trombone
GeneralBackbore—
Best suited for
General trombone use
Good round tone in all registers; all-around
Which is better?
The Conn Imp. Precision 4 is designed for orchestral playing, while the Conn Precision 3A targets general use. Your best choice depends on your musical context.