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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
Mouthpiece A
    Bob Reeves 43/F
    • Flugelhorn
    Cup diameter17.07 mm / 0.6720 in
    Cup depthMedium
    Rim width—
    Throat diameter—
    Backbore—
    Finish—
    Material—
    vs
    Mouthpiece B
      GR Technologies 66.5FL Almeida
      • Flugelhorn
      Cup diameter16.89 mm / 0.6650 in
      Cup depthMedium
      Rim width—
      Throat diameter—
      Backbore—
      Finish—
      Material—

      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.

      Cup Depth

      Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.

      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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