Conn Imp. Precision 4 vs Conn Precision 1
the Conn Imp. Precision 4 features a deeper cup.
Mouthpiece A
Conn Imp. Precision 4
• Trombone
OrchestralCup diameter—
Cup depth
Rim width—
Throat diameter—
Backbore—
Finish—
MaterialSilver-plated brass
Best suited for
Bass trombone / large bore tenor
Full rich deep tone
vs
Mouthpiece B
Conn Precision 1
• Trombone
OrchestralCup diameter—
Cup depth
Rim width—
Throat diameter—
Backbore—
Finish—
MaterialSilver-plated brass
Best suited for
Large bore trombones; symphony work
Good clear tone; large bore symphonic
Cup Depth
The Conn Imp. Precision 4 has a — cup while the Conn Precision 1 has a — cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Material
Both mouthpieces share the same listed material (Silver-plated brass).
Which is better?
Both mouthpieces are categorized as "Orchestral" — the physical dimensions above will determine which suits your embouchure and playing style better.