Bach 6½AL (large shank) vs Denis Wick 4.5AL
The Denis Wick 4.5AL has a wider cup diameter, the Denis Wick 4.5AL features a deeper cup, the Denis Wick 4.5AL has a larger throat opening.
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
Denis Wick 4.5AL
• Trombone
Cup depthVery deep
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Depth
The Denis Wick 4.5AL has a very deep cup while the Bach 6½AL (large shank) has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
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.