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Bach 5C vs GR Technologies X66.8 C*

The GR Technologies X66.8 C* has a wider cup diameter, the GR Technologies X66.8 C* features a deeper cup.

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 5C
    • Trumpet
    Throat diameter3.66 mm / 0.1441 in
    Best suited for
    🎵All-round versatile — balanced cup for general playing
    vs
    Mouthpiece B
      GR Technologies X66.8 C*
      • Trumpet
      Throat diameter—
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone

      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 Bach 5C details GR Technologies X66.8 C* details Bach 5C equivalents GR Technologies X66.8 C* equivalents

      Compare Bach 5C with others

      Compare GR Technologies X66.8 C* with others

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