Bach 6½AL (large shank) vs Conn Precision 1
the Conn Precision 1 features a deeper cup.
Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.
Mouthpiece A
Bach 6½AL (large shank)
• Trombone
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Conn Precision 1
• Trombone
OrchestralMaterialSilver-plated brass
Best suited for
Large bore trombones; symphony work
Good clear tone; large bore symphonic
Material
The Bach 6½AL (large shank) is described as unspecified, and the Conn Precision 1 as Silver-plated brass. Material affects mass, warmth, and how quickly the piece responds.
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.