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GR Technologies 67MX vs Yamaha TR-14B4

The GR Technologies 67MX has a wider cup diameter, the GR Technologies 67MX features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
    GR Technologies 67MX
    • Trumpet
    Backbore—
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    vs
    Mouthpiece B
      Yamaha TR-14B4
      • Trumpet
      BackboreSemi-narrow

      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 GR Technologies 67MX details Yamaha TR-14B4 details GR Technologies 67MX equivalents Yamaha TR-14B4 equivalents

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