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Bach 1½GM vs Denis Wick 1AL

The Denis Wick 1AL has a wider cup diameter, the Bach 1½GM 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 1½GM
    • Trombone
    Cup diameter27.00 mm / 1.0630 in
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Denis Wick 1AL
      • Trombone
      Cup diameter27.11 mm / 1.0673 in
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone
      📣High-volume projection — open throat for power

      Cup Diameter

      The Denis Wick 1AL has a cup diameter of 27.11 mm / 1.0673 in compared to 27.00 mm / 1.0630 in on the Bach 1½GM — a difference of 0.11 mm / 0.0043 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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