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Bach 12C vs Denis Wick 5BL

The Denis Wick 5BL has a wider cup diameter, the Denis Wick 5BL features a deeper cup, the Denis Wick 5BL has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
    Bach 12C
    • Trombone
    Throat diameter5.85 mm / 0.2303 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Denis Wick 5BL
      • Trombone
      Throat diameter6.87 mm / 0.2705 in
      Best suited for
      📣High-volume projection — open throat for power

      Throat Diameter

      The Denis Wick 5BL has a wider throat (6.87 mm / 0.2705 in vs 5.85 mm / 0.2303 in). 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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