Conn Imp. Precision 1 vs Conn Precision 4
the Conn Precision 4 features a deeper cup.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Conn Imp. Precision 1
• Trombone
OrchestralThroat diameter—
Best suited for
Large bore trombones; symphony
Good clear tone; large bore symphonic
vs
Mouthpiece B
Conn Precision 4
• Trombone
OrchestralThroat diameter—
Best suited for
Bass trombone
Full rich deep tone quality
Which is better?
Both mouthpieces are categorized as "Orchestral" — the physical dimensions above will determine which suits your embouchure and playing style better.