Conn Imp. Precision 5 vs Yamaha SL-48DL
the Conn Imp. Precision 5 features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Conn Imp. Precision 5
• Trombone
GeneralCup diameter—
Best suited for
Connstellation-equipped tenor trombone
Designed for Connstellation 24I/25I
vs
Mouthpiece B
Yamaha SL-48DL
• Trombone
Cup diameter25.25 mm / 0.9941 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Which is better?
Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.