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Bach 5GL vs Denis Wick 5AL

The Denis Wick 5AL has a wider cup diameter, the Bach 5GL features a deeper cup, 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
    Bach 5GL
    • Trombone
    Cup diameter25.50 mm / 1.0039 in
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Denis Wick 5AL
      • Trombone
      Cup diameter25.73 mm / 1.0130 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 25.50 mm / 1.0039 in on the Bach 5GL — a difference of 0.23 mm / 0.0091 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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