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Bob Reeves 43/F vs GR Technologies 66.5FL Almeida

The Bob Reeves 43/F 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
    Bob Reeves 43/F
    • Flugelhorn
    Cup diameter17.07 mm / 0.6720 in
    vs
    Mouthpiece B
      GR Technologies 66.5FL Almeida
      • Flugelhorn
      Cup diameter16.89 mm / 0.6650 in

      Cup Diameter

      The Bob Reeves 43/F has a cup diameter of 17.07 mm / 0.6720 in compared to 16.89 mm / 0.6650 in on the GR Technologies 66.5FL Almeida — a difference of 0.18 mm / 0.0071 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.

      Open in interactive tool + Add third mouthpiece Bob Reeves 43/F details GR Technologies 66.5FL Almeida details Bob Reeves 43/F equivalents GR Technologies 66.5FL Almeida equivalents

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