Conn Imp. Precision 1 vs Conn Precision 1
Both mouthpieces share similar core dimensions — the differences are in the details.
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
Conn Imp. Precision 1
• Trombone
OrchestralBackbore—
Best suited for
Large bore trombones; symphony
Good clear tone; large bore symphonic
vs
Mouthpiece B
Conn Precision 1
• Trombone
OrchestralBackbore—
Best suited for
Large bore trombones; symphony work
Good clear tone; large bore symphonic
Which is better?
Both mouthpieces are categorized as "Orchestral" — the physical dimensions above will determine which suits your embouchure and playing style better.