Bruno Tilz 306-10 GT vs Bruno Tilz 306-9 1/2 GT

the Bruno Tilz 306-10 GT has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Bruno Tilz 306-10 GT
    • Trombone
    Catalog
    Cup diameter29.50 mm / 1.1614 in
    Cup depth
    Rim width
    Throat diameter7.80 mm / 0.3071 in
    Backbore
    Finish
    Material
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Bruno Tilz 306-9 1/2 GT
      • Trombone
      Catalog
      Cup diameter29.50 mm / 1.1614 in
      Cup depthDeep
      Rim width
      Throat diameter7.30 mm / 0.2874 in
      Backbore
      Finish
      Material
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone
      📣High-volume projection — open throat for power

      Cup Diameter

      Both mouthpieces have virtually identical cup diameters at 29.50 mm / 1.1614 in.

      Throat Diameter

      The Bruno Tilz 306-10 GT has a wider throat (7.80 mm / 0.3071 in vs 7.30 mm / 0.2874 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.

      Which is better?

      Both mouthpieces are categorized as "Catalog" — the physical dimensions above will determine which suits your embouchure and playing style better.

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