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Denis Wick 6BS vs Denis Wick 9BL

The Denis Wick 6BS has a wider cup diameter.

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 6BS
    • Trombone
    Cup diameter25.40 mm / 1.0000 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Denis Wick 9BL
      • Trombone
      Cup diameter25.00 mm / 0.9843 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Denis Wick 6BS has a cup diameter of 25.40 mm / 1.0000 in compared to 25.00 mm / 0.9843 in on the Denis Wick 9BL — a difference of 0.40 mm / 0.0157 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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