Conn Imp. Precision 1 vs Conn Imp. Precision 4
the Conn Imp. Precision 4 features a deeper cup.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
Conn Imp. Precision 1
• Trombone
OrchestralCup depth
Best suited for
Large bore trombones; symphony
Good clear tone; large bore symphonic
vs
Mouthpiece B
Conn Imp. Precision 4
• Trombone
OrchestralCup depth
Best suited for
Bass trombone / large bore tenor
Full rich deep tone
Cup Depth
The Conn Imp. Precision 4 has a — cup while the Conn Imp. Precision 1 has a — cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Which is better?
Both mouthpieces are categorized as "Orchestral" — the physical dimensions above will determine which suits your embouchure and playing style better.