Bach 6½AL (large shank) vs Conn Precision 2
Both mouthpieces share similar core dimensions — the differences are in the details.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
Bach 6½AL (large shank)
• Trombone
Cup depthDeep
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Conn Precision 2
• Trombone
LeadCup depthDeep
Best suited for
Solo work; high register; bright
Big bright tone; excellent solo
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
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.