Bruno Tilz 304- T 3 vs Kelly 5G-EU-SS

The Kelly 5G-EU-SS has a wider cup diameter, the Kelly 5G-EU-SS features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Bruno Tilz 304- T 3
    • Baritone / Euphonium
    Catalog
    Cup diameter24.00 mm / 0.9449 in
    Cup depthDeep
    Rim width
    Throat diameter4.80 mm / 0.1890 in
    Backbore
    Finish
    Material
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Kelly 5G-EU-SS
      • Baritone / Euphonium
      General
      Cup diameter25.40 mm / 1.0000 in
      Cup depth
      Rim width
      Throat diameter
      BackboreL
      Finish
      Material316 Surgical Stainless Steel
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone
      📋Euphonium general use

      Cup Diameter

      The Kelly 5G-EU-SS has a cup diameter of 25.40 mm / 1.0000 in compared to 24.00 mm / 0.9449 in on the Bruno Tilz 304- T 3 — a difference of 1.40 mm / 0.0551 in. A wider cup generally produces a fuller, darker tone but requires more air support.

      Cup Depth

      The Kelly 5G-EU-SS has a — cup while the Bruno Tilz 304- T 3 has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      Material

      The Bruno Tilz 304- T 3 is described as unspecified, and the Kelly 5G-EU-SS as 316 Surgical Stainless Steel. Material affects mass, warmth, and how quickly the piece responds.

      Which is better?

      The Bruno Tilz 304- T 3 is designed for catalog playing, while the Kelly 5G-EU-SS targets general use. Your best choice depends on your musical context.

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