Bruno Tilz 214-4 vs Kelly BASS-BONE-LS-SS

The Kelly BASS-BONE-LS-SS has a wider cup diameter, the Kelly BASS-BONE-LS-SS features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Bruno Tilz 214-4
    • Trombone
    Catalog
    Cup diameter25.50 mm
    Cup depthMedium
    Rim width
    Throat diameter5.80 mm
    Backbore
    Finish
    Material
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Kelly BASS-BONE-LS-SS
      • Trombone
      Bass
      Cup diameter27.69 mm
      Cup depth
      Rim width
      Throat diameter
      BackboreL
      Finish
      Material316 Surgical Stainless Steel
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone
      📋Bass trombone

      Cup Diameter

      The Kelly BASS-BONE-LS-SS has a cup diameter of 27.69 mm compared to 25.50 mm on the Bruno Tilz 214-4 — a difference of +2.19 mm. A wider cup generally produces a fuller, darker tone but requires more air support.

      Cup Depth

      The Kelly BASS-BONE-LS-SS has a — cup while the Bruno Tilz 214-4 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      Material

      The Bruno Tilz 214-4 is described as unspecified, and the Kelly BASS-BONE-LS-SS as 316 Surgical Stainless Steel. Material affects mass, warmth, and how quickly the piece responds.

      Which is better?

      The Bruno Tilz 214-4 is designed for catalog playing, while the Kelly BASS-BONE-LS-SS targets bass use. Your best choice depends on your musical context.

      Open in interactive tool + Add third mouthpiece Bruno Tilz 214-4 details Kelly BASS-BONE-LS-SS details Bruno Tilz 214-4 equivalents Kelly BASS-BONE-LS-SS equivalents