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GR Technologies 3S vs Schilke 13A4a

Both mouthpieces share similar core dimensions — the differences are in the details.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    GR Technologies 3S
    • Trumpet
    Cup diameter16.76 mm / 0.6598 in
    Cup depthShallow
    Rim width—
    Throat diameter—
    Backbore—
    Finish—
    Material—
    vs
    Mouthpiece B
      Schilke 13A4a
      • Trumpet
      Cup diameter16.76 mm / 0.6598 in
      Cup depthShallow
      Rim width—
      Throat diameter3.66 mm / 0.1441 in
      Backbore27
      Finish—
      Material—

      Cup Diameter

      Both mouthpieces have virtually identical cup diameters at 16.76 mm / 0.6598 in.

      Cup Depth

      Both mouthpieces share a shallow 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 GR Technologies 3S details Schilke 13A4a details GR Technologies 3S equivalents Schilke 13A4a equivalents

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