Denis Wick 5AL vs Denis Wick 6BL

The Denis Wick 5AL has a wider cup diameter, the Denis Wick 5AL has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
    Denis Wick 5AL
    • Trombone
    Cup diameter25.73 mm / 1.0130 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Denis Wick 6BL
      • Trombone
      Cup diameter25.40 mm / 1.0000 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Denis Wick 5AL has a cup diameter of 25.73 mm / 1.0130 in compared to 25.40 mm / 1.0000 in on the Denis Wick 6BL — a difference of 0.33 mm / 0.0130 in. A wider cup generally produces a fuller, darker tone but requires more air support.

      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.

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