Bruno Tilz 306-8 GT vs Schilke 45

The Bruno Tilz 306-8 GT has a wider cup diameter, the Bruno Tilz 306-8 GT features a deeper cup, the Bruno Tilz 306-8 GT has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Bruno Tilz 306-8 GT
    • Trombone
    Catalog
    Cup diameter28.00 mm
    Cup depthDeep
    Rim width
    Throat diameter7.20 mm
    Backbore
    Finish
    Material
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Schilke 45
      • Trombone
      Cup diameter24.38 mm
      Cup depthMedium
      Rim width
      Throat diameter5.95 mm
      Backbore15/64 .2344"
      Finish
      Material
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Bruno Tilz 306-8 GT has a cup diameter of 28.00 mm compared to 24.38 mm on the Schilke 45 — a difference of +3.62 mm. A wider cup generally produces a fuller, darker tone but requires more air support.

      Cup Depth

      The Bruno Tilz 306-8 GT has a deep cup while the Schilke 45 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      Throat Diameter

      The Bruno Tilz 306-8 GT has a wider throat (7.20 mm vs 5.95 mm). A wider throat allows more air through, increasing volume and projection but reducing resistance.

      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.

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