Bach 7C vs Denis Wick 4BL

The Denis Wick 4BL has a wider cup diameter, the Denis Wick 4BL features a deeper cup, the Denis Wick 4BL has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Bach 7C
    • Trombone
    Cup diameter24.75 mm
    Cup depthShallow
    Rim width
    Throat diameter5.85 mm
    Backbore
    Finish
    Material
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Denis Wick 4BL
      • Trombone
      Cup diameter25.90 mm
      Cup depthMedium
      Rim width6.77 mm
      Throat diameter7.13 mm
      Backboremedium
      Finish
      Material
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Denis Wick 4BL has a cup diameter of 25.90 mm compared to 24.75 mm on the Bach 7C — a difference of +1.15 mm. A wider cup generally produces a fuller, darker tone but requires more air support.

      Cup Depth

      The Denis Wick 4BL has a medium cup while the Bach 7C has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      Throat Diameter

      The Denis Wick 4BL has a wider throat (7.13 mm vs 5.85 mm). A wider throat allows more air through, increasing volume and projection but reducing resistance.

      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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