Conn Imp. Precision 4 vs Conn Precision 3
the Conn Imp. Precision 4 features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Conn Imp. Precision 4
• Trombone
OrchestralCup diameter—
Best suited for
Bass trombone / large bore tenor
Full rich deep tone
vs
Mouthpiece B
Conn Precision 3
• Trombone
GeneralCup diameter—
Best suited for
Musicians with large lips; all kinds of band work
Full round tone; ideal for large lips
Which is better?
The Conn Imp. Precision 4 is designed for orchestral playing, while the Conn Precision 3 targets general use. Your best choice depends on your musical context.