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Bruno Tilz 305-D 5 vs Giardinelli 3GM

the Giardinelli 3GM features a deeper cup, the Giardinelli 3GM has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Bruno Tilz 305-D 5
    • Trombone
    Catalog
    Cup diameter26.00 mm / 1.0236 in
    Cup depthMedium
    Rim width—
    Throat diameter6.30 mm / 0.2480 in
    Backbore—
    Finish—
    Material—
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Giardinelli 3GM
      • Trombone
      Cup diameter26.00 mm / 1.0236 in
      Cup depthDeep
      Rim width—
      Throat diameter6.75 mm / 0.2657 in
      Backbore17/64 (.265)"
      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 26.00 mm / 1.0236 in.

      Cup Depth

      The Giardinelli 3GM has a deep cup while the Bruno Tilz 305-D 5 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      Throat Diameter

      The Giardinelli 3GM has a wider throat (6.75 mm / 0.2657 in vs 6.30 mm / 0.2480 in). 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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