Bach 6½AL (large shank) vs Conn Imp. Precision 2
Both mouthpieces share similar core dimensions — the differences are in the details.
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 Imp. Precision 2
• Trombone
LeadMaterialSilver-plated brass
Best suited for
Solo; high register
Big bright tone; excellent solo
Material
The Bach 6½AL (large shank) is described as unspecified, and the Conn Imp. Precision 2 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.